fundamentally cool physics with trapped atoms and ions · 2019-07-18 · fundamentally cool physics...
TRANSCRIPT
![Page 1: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/1.jpg)
W
e
d
u
d
d
u
u
θei
θeν
~precoil
~pe ~pν
Fundamentally Cool Physics
with Trapped Atoms and Ions
Dan MelconianApril 23, 2017
![Page 2: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/2.jpg)
Overview
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 1
1. Fundamental symmetries
what is our current understanding?
how do we test what lies beyond?
2. TAMU Penning Trap
physics of superallowed β decay
ion trapping of proton-rich nuclei at T-REX
3. TRIUMF Neutral Atom Trap
angular correlations of polarized 37K
recent results
![Page 3: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/3.jpg)
Scope of fundamental physics
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 2
uu
d d
ud
d uu
d du
quarks
nucleons
electrons
the atom
from the very smallest scales . . .
![Page 4: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/4.jpg)
Scope of fundamental physics
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 2
uu
d d
ud
d uu
d du
quarks
nucleons
electrons
the atom
from the very smallest scales . . .
GeV
10–1
3×10–1010–12
2×10–13
10191015
1.67 min
109 y12×109 y
10–37 s10–44 s
10–10 s10µs
3×105 y
102
10–4
. . . to the very largest
![Page 5: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/5.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
![Page 6: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/6.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
quantum + special rel ⇒ quantum field theory
![Page 7: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/7.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
quantum + special rel ⇒ quantum field theory
Noether’s theorem: symmetry ⇔ conservation law
![Page 8: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/8.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
quantum + special rel ⇒ quantum field theory
Noether’s theorem: symmetry ⇔ conservation law
Maxwell’s eqns invariant under
changes in vector potential⇔
conservation of
electric charge, q
![Page 9: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/9.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
quantum + special rel ⇒ quantum field theory
Noether’s theorem: symmetry ⇔ conservation law
Maxwell’s eqns invariant under
changes in vector potential⇔
conservation of
electric charge, q
and there are other symmetries too:time ⇔ energy
space ⇔ momentum
rotations ⇔ angular momentum...
![Page 10: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/10.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Model
quantum + special rel ⇒ quantum field theory
Noether’s theorem: symmetry ⇔ conservation law
12 elementary particles, 4 fundamental forces
1st 2nd 3rd Q
lep
ton
s (
νee
)(
νµµ
)(
νττ
)
0−1
qu
ark
s (
ud
) (
cs
) (
tb
)
+2/3−1/3
mediator force
g strong
W±
weakZ
γ EM
![Page 11: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/11.jpg)
The Standard Model
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 3
All of the known elementary particles and their interactions are
described within the framework of
The Standard Modelnew
quantum + special rel ⇒ quantum field theory
Noether’s theorem: symmetry ⇔ conservation law
12 elementary particles, 4 fundamental forces
and 1 Higgs boson
1st 2nd 3rd Q
lep
ton
s (
νee
)(
νµµ
)(
νττ
)
0−1
qu
ark
s (
ud
) (
cs
) (
tb
)
+2/3−1/3
mediator force
g strong
W±
weakZ
γ EM
![Page 12: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/12.jpg)
That’s all fine and dandy, but. . .
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 4
does the Standard Model work??
![Page 13: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/13.jpg)
That’s all fine and dandy, but. . .
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 4
does the Standard Model work??
it predicted the existence of the W±, Z, g, c and t and now the Higgs!
is a renormalizable theory
GSW ⇒ unified the weak force with electromagnetism
QCD explains quark confinement
![Page 14: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/14.jpg)
That’s all fine and dandy, but. . .
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 4
does the Standard Model work??
it predicted the existence of the W±, Z, g, c and t and now the Higgs!
is a renormalizable theory
GSW ⇒ unified the weak force with electromagnetism
QCD explains quark confinement
aµ×1010−11659000
±1 part-per-million!!(PRL 92 (2004) 161802)
aµ ≡ 12(g − 2)
![Page 15: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/15.jpg)
That’s all fine and dandy, but. . .
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 4
does the Standard Model work??
it predicted the existence of the W±, Z, g, c and t and now the Higgs!
is a renormalizable theory
GSW ⇒ unified the weak force with electromagnetism
QCD explains quark confinement
aµ×1010−11659000
±1 part-per-million!!(PRL 92 (2004) 161802)
aµ ≡ 12(g − 2)
Wow . . . this is
the most precisely tested theory ever conceived!
![Page 16: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/16.jpg)
But there are still questions . . .
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 5
parameters values: does our “ultimate” theory really need 25 arbitrary con-stants? Do they change with time?
dark matter: SM physics makes up less than 5% of the energy-matter of theuniverse!
baryon asymmetry: why more matter than anti-matter?
strong CP: do axions exist? Fine-tuning?
neutrinos: Dirac or Majorana? Mass hierarchy?
fermion generations: why three families?
weak mixing: Is the CKM matrix unitary?
parity violation: is parity maximally violated in the weak interaction? Noright-handed currents?
gravity: of course can’t forget about a quantum description of gravity!
![Page 17: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/17.jpg)
How we all test the SM
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 6
colliders: CERN, SLAC, FNAL, BNL, KEK, DESY . . .
nuclear physics: traps, exotic beams, neutron, EDMs, 0νββ, . . .
cosmology & astrophysics: SN1987a, Big Bang nucleosynthesis, . . .
muon decay: Michel parameters: ρ, δ, η, and ξ
atomic physics: anapole moment, spectroscopy, . . .
![Page 18: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/18.jpg)
How we all test the SM
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 6
colliders: CERN, SLAC, FNAL, BNL, KEK, DESY . . .
nuclear physics: traps, exotic beams, neutron, EDMs, 0νββ, . . .
cosmology & astrophysics: SN1987a, Big Bang nucleosynthesis, . . .
muon decay: Michel parameters: ρ, δ, η, and ξ
atomic physics: anapole moment, spectroscopy, . . .
all of these techniques are complementary and important
• different experiments probe different (new) physics
• if signal seen, cross-checks crucial!
![Page 19: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/19.jpg)
How we all test the SM
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 6
colliders: CERN, SLAC, FNAL, BNL, KEK, DESY . . .
nuclear physics: traps, exotic beams, neutron, EDMs, 0νββ, . . .
cosmology & astrophysics: SN1987a, Big Bang nucleosynthesis, . . .
muon decay: Michel parameters: ρ, δ, η, and ξ
atomic physics: anapole moment, spectroscopy, . . .
all of these techniques are complementary and important
• different experiments probe different (new) physics
• if signal seen, cross-checks crucial!
often they are interdisciplinary
(which makes it extra fun!)
![Page 20: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/20.jpg)
How does high-energy physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 7
colliders: CERN, SLAC, FNAL, BNL, KEK, DESY, . . . .
direct search of particles
27 km
![Page 21: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/21.jpg)
How does high-energy physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 7
colliders: CERN, SLAC, FNAL, BNL, KEK, DESY, . . . .
direct search of particles
27 km
large multi-national collabs
billion $ price-tags
![Page 22: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/22.jpg)
How does nuclear physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 8
![Page 23: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/23.jpg)
How does nuclear physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 8
![Page 24: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/24.jpg)
How does nuclear physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 9
nuclear physics: radioactive ion beam facilities
indirect search via precision measurements
![Page 25: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/25.jpg)
How does nuclear physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 9
nuclear physics: radioactive ion beam facilities
indirect search via precision measurements
![Page 26: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/26.jpg)
How does nuclear physics test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 9
nuclear physics: radioactive ion beam facilities
indirect search via precision measurements
smaller collaborations
contribute to all aspects
“table-top” physics
![Page 27: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/27.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Begin by looking at the rate for β decay
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2
![Page 28: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/28.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Begin by looking at the rate for β decay
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2
![Page 29: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/29.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
![Page 30: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/30.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
scalar
aβν =−|CS |
2 − |C′
S |2
|CS |2+|C′
S |2
vector
aβν =|CV |2+|C′
V |2
|CV |2+|C′
V |2
![Page 31: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/31.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
scalar
aβν =−|CS |
2 − |C′
S |2
|CS |2+|C′
S |2
vector
aβν =|CV |2+|C′
V |2
|CV |2+|C′
V |2
aβν =|CV |
2 + |C ′V |
2 − |CS |2 − |C ′
S |2
|CV |2 + |C ′V |
2 + |CS |2 + |C ′S |
2= 1??
![Page 32: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/32.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
aβν =|CV |
2 + |C ′V |
2 − |CS |2 − |C ′
S |2
|CV |2 + |C ′V |
2 + |CS |2 + |C ′S |
2= 1??
This correlation is quadratic in the couplings. . . not as sensitive as the
Fierz parameter, which is linear:
bF =−2ℜe(C∗
SCV + C ′∗S C
′V )
|CV |2 + |C ′V |
2 + |CS |2 + |C ′S |
2= 0??
see Gonzalez-Alonso and Naviliat-Cuncic, PRC 94, 035503 (2016)
![Page 33: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/33.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
+〈~I〉
I·
[
Aβ~peEe
︸ ︷︷ ︸
β asym
+Bν~pνEν
︸ ︷︷ ︸
ν asym
+D~pe × ~pνEeEν
︸ ︷︷ ︸
T–violating
]
+ . . .
)
θe,i
~pe ~pν
θν,i
![Page 34: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/34.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
+〈~I〉
I·
[
Aβ~peEe
︸ ︷︷ ︸
β asym
+Bν~pνEν
︸ ︷︷ ︸
ν asym
+D~pe × ~pνEeEν
︸ ︷︷ ︸
T–violating
]
+ . . .
)
θe,i
~pe ~pν
θν,iE.g. Aβ = −2ρ
1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
− ρ(1−y2)5(1+y2)
]
where x ≈ (ML/MR)2− ζ
and y ≈ (ML/MR)2 + ζ
are right-handed current parameters that are zero in the
SM, and ρ ≡CAMGT
CV MF
![Page 35: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/35.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
+〈~I〉
I·
[
Aβ~peEe
︸ ︷︷ ︸
β asym
+Bν~pνEν
︸ ︷︷ ︸
ν asym
+D~pe × ~pνEeEν
︸ ︷︷ ︸
T–violating
]
+ . . .
)
θe,i
~pe ~pν
θν,iE.g. Aβ = −2ρ
1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
− ρ(1−y2)5(1+y2)
]
where x ≈ (ML/MR)2− ζ
and y ≈ (ML/MR)2 + ζ
are right-handed current parameters that are zero in the
SM, and ρ ≡CAMGT
CV MF
β-decay parameters depend on the currents mediating the
weak interaction
⇒ sensitive to new physics ⇐
![Page 36: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/36.jpg)
How specifically do I plan to test the SM?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 10
Expand to the often-quoted angular distribution of the decay:
(Jackson, Treiman and Wyld, Phys Rev 106 and Nucl Phys 4, 1957)
d5W
dEedΩedΩνe
=
basic decay rate︷ ︸︸ ︷
G2F |Vud|
2
(2π)5peEe(A − Ee)
2ξ
(
1 +
β−ν correlation︷ ︸︸ ︷
aβν
~pe · ~pνeEeEνe
+
Fierz term︷ ︸︸ ︷
bΓme
Ee
+〈~I〉
I·
[
Aβ~peEe
︸ ︷︷ ︸
β asym
+Bν~pνEν
︸ ︷︷ ︸
ν asym
+D~pe × ~pνEeEν
︸ ︷︷ ︸
T–violating
]
+ . . .
)
θe,i
~pe ~pν
θν,iE.g. Aβ = −2ρ
1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
− ρ(1−y2)5(1+y2)
]
where x ≈ (ML/MR)2− ζ
and y ≈ (ML/MR)2 + ζ
are right-handed current parameters that are zero in the
SM, and ρ ≡CAMGT
CV MF
β-decay parameters depend on the currents mediating the
weak interaction
⇒ sensitive to new physics ⇐
Goal must be . 0.1% to complement LHC
Naviliat-Cuncic and Gonzalez-Alonso, Ann. Phys. 525, 600 (2013)Cirigliano, Gonzalez-Alonso and Graesser, JHEP 1302, 046 (2013)
Vos, Wilschut and Timmermans, RMP 87, 1483 (2015)
![Page 37: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/37.jpg)
How to acheive our goal?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 11
dud
duu
We
ν
θei
θeν
~precoil
~pe ~pν
perform a β decay experiment on
short-lived isotopes
![Page 38: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/38.jpg)
How to acheive our goal?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 11
θei
θeν
~precoil
~pe ~pν
dud
duu
We
ν
perform a β decay experiment on
short-lived isotopes
make a precision measurement of
the angular correlation parameters
![Page 39: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/39.jpg)
How to acheive our goal?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 11
θei
θeν
~precoil
~pe ~pν
dud
duu
We
ν
perform a β decay experiment on
short-lived isotopes
make a precision measurement of
the angular correlation parameters
compare the SM predictions to obser-
vations
![Page 40: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/40.jpg)
How to acheive our goal?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 11
θei
θeν
~precoil
~pe ~pν
dud
duu
We
ν
perform a β decay experiment on
short-lived isotopes
make a precision measurement of
the angular correlation parameters
compare the SM predictions to obser-
vations
look for deviations as an indication of
new physics
![Page 41: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/41.jpg)
How to acheive our goal?
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 11
θei
θeν
~precoil
~pe ~pν
dud
duu
We
ν
perform a β decay experiment on
short-lived isotopes
make a precision measurement of
the angular correlation parameters
compare the SM predictions to obser-
vations
look for deviations as an indication of
new physics
perform a nuclear measurement
– often using atomic techniques –
to test high-energy theories
![Page 42: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/42.jpg)
C.S. Wu’s experiment – Parity violation
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 12
![Page 43: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/43.jpg)
C.S. Wu’s experiment – Parity violation
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 12
so much scattering!
low polarization
short relaxation time
poor sample purity
pain to flip the spin
need long t1/2
![Page 44: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/44.jpg)
Traps around the world
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 13
Many groups around the world realize the potential of using traps for
precision weak interaction studies
Fr
He
Na
K,Fr
atom traps ion traps
(Na)
![Page 45: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/45.jpg)
Overview
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 14
1. Fundamental symmetries
what is our current understanding?
how do we test what lies beyond?
2. TAMU Penning Trap
physics of superallowed β decay
ion trapping of proton-rich nuclei at T-REX
3. TRIUMF Neutral Atom Trap
angular correlations of polarized 37K
recent results
![Page 46: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/46.jpg)
T = 2 superallowed decays
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 15
β+
0+, T =2
γp
0+, T =2
N
Z Stable
T = 1
T = 2
44Cr40Ti
28S
36Ca
24Si
20Mg
32Ar
β − ν correlations
model-dependence of δC calcs seem to depend on T . . .
new cases for Vud
![Page 47: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/47.jpg)
T = 2 superallowed decays
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 15
N
Z
β+
0+, T =2
γp
0+, T =2
vector
scalar
Stable
T = 1
T = 2
44Cr40Ti
28S
36Ca
24Si
20Mg
32Ar
β − ν correlations
model-dependence of δC calcs seem to depend on T . . .
new cases for Vud
Recall: pure Fermi decay ⇔ minimal nuclear
structure effects; decay rate is simply given by:
peEe(A − Ee)2ξ(
1 + aβν~pe · ~pνEeEν
+ bFΓme
Ee
)
![Page 48: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/48.jpg)
β − ν correlation from 32Ar
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 16
Doppler shape of delayed proton
depends on ~pe · ~pν !vector
scalar
![Page 49: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/49.jpg)
β − ν correlation from 32Ar
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 16
Doppler shape of delayed proton
depends on ~pe · ~pν !vector
scalar
![Page 50: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/50.jpg)
β − ν correlation from 32Ar
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 16
Doppler shape of delayed proton
depends on ~pe · ~pν !vector
scalar
p
32Ar
B = 3.5T
e+
detector
![Page 51: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/51.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
![Page 52: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/52.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
![Page 53: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/53.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
![Page 54: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/54.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
Ring
Electrode
Compensation
Electrode
Compensation
Electrode
Po
sitio
n-s
en
sitiv
ed
ete
cto
r
End Cap End Cap
~B
![Page 55: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/55.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
Ring
Electrode
Compensation
Electrode
Compensation
Electrode
Po
sitio
n-s
en
sitiv
ed
ete
cto
r
End Cap End Cap
![Page 56: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/56.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
![Page 57: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/57.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
![Page 58: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/58.jpg)
But why throw away useful information??
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 17
We can improve the correlation measurement
by retaining information about the β
utilize technology of Penning traps to provide a
backing-free source of localized radioactive ions!!
![Page 59: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/59.jpg)
A Penning trap at T-REX CI/TAMU
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 18
![Page 60: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/60.jpg)
The Texas A&M University Penning Trap
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 19
will be the world’s most open-geometry ion trap!
uniquely suited for studying β-delayed proton decays:
β − ν correlations, ft values/Vud
mass measurements, EC studies, laser spectroscopy, . . .
re−commissioned
K150 cyclotron
production
target
BigSol
separator multi−RFQ
heavy−ion guide
TAMUTRAPto charge−breeder
and K500 cyclotron
ortho−TOF
gas−catcher
ANL−type
![Page 61: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/61.jpg)
The Texas A&M University Penning Trap
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 19
will be the world’s most open-geometry ion trap!
uniquely suited for studying β-delayed proton decays:
β − ν correlations, ft values/Vud
mass measurements, EC studies, laser spectroscopy, . . .
re−commissioned
K150 cyclotron
ion
RIB from
cooler & buncher
HV cageASR magnet7T/210mm
source
K150/HI guide
![Page 62: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/62.jpg)
The Texas A&M University Penning Trap
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 19
will be the world’s most open-geometry ion trap!
uniquely suited for studying β-delayed proton decays:
β − ν correlations, ft values/Vud
mass measurements, EC studies, laser spectroscopy, . . .
re−commissioned
K150 cyclotron
ion
RIB from
cooler & buncher
HV cageASR magnet7T/210mm
source
K150/HI guide
![Page 63: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/63.jpg)
Status in 2013
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 20
![Page 64: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/64.jpg)
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 65: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/65.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 66: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/66.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 67: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/67.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 68: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/68.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 69: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/69.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 70: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/70.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Able to transport cooled and bunched beam through
magnet
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 71: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/71.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Able to transport cooled and bunched beam through
magnet
Began trapping off-line ions summer 2016
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
![Page 72: Fundamentally Cool Physics with Trapped Atoms and Ions · 2019-07-18 · Fundamentally Cool Physics with Trapped Atoms and Ions Dan Melconian April 23, 2017. Overview Dan Melconian](https://reader037.vdocuments.net/reader037/viewer/2022100303/5f0406a87e708231d40bf35e/html5/thumbnails/72.jpg)
Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Able to transport cooled and bunched beam through
magnet
Began trapping off-line ions summer 2016
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
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Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Able to transport cooled and bunched beam through
magnet
Began trapping off-line ions summer 2016
Currently working on rf excitation (magnetron for
cleaning and dipole for mass measurements)
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
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Recent Milestones
RFQ commissioned with high efficiency [Mehlman PhD]
Prototype (45-mm diam) trap installed
Able to transport cooled and bunched beam through
magnet
Began trapping off-line ions summer 2016
Currently working on rf excitation (magnetron for
cleaning and dipole for mass measurements)
Connect to heavy ion guide this summer (?)
Current Status
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 21
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Overview
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 22
1. Fundamental symmetries
what is our current understanding?
how do we test what lies beyond?
2. TAMU Penning Trap
physics of superallowed β decay
ion trapping of proton-rich nuclei at T-REX
3. TRIUMF Neutral Atom Trap
angular correlations of polarized 37K
recent results
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The β+-decay of 37K
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 23
Almost as simple as 0+→ 0+:isobaric analogue decay
strong branch to g.s.
3.6697.89(11)%
4.96
6.35
3.79
6.88
7.51
7.39
5/2+ 2796 keV
3/2+ 3938 keV
3/2+ 3602 keV
5/2+ 3170 keV
3/2− 2490 keV
7/2− 1611 keV1/2+ 1410 keV
37Ar
9.7(
12)
215(
11)
9(3)
27(2
)2.
04(1
1)%
43(3
)26
3(14
)27
(4)
289(
15)
96(6
)
42.2(75)25(20)
29(4)
2.07(11)%27(2)
224(12)
11.6(13) 5.78
37K β+QEC = 6.14746(23) MeV
1.2365(9) s 3/2+
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The β+-decay of 37K
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 23
Almost as simple as 0+→ 0+:
5/2+
3/2+
3/2+
3718Ar
1.225(7) s
β+3719K
3/2+0.022%
2.07(11)%
97.99(14)%
isobaric analogue decay
strong branch to g.s.
polarization/alignment
mixed Fermi/Gamow-Teller
⇒ need ρ ≡ GAMGT/GV MF
to get SM prediction for correlation
parameters
get ρ from the comparative half-life: ρ2 =2Ft0
+→0+
Ft− 1
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The β+-decay of 37K
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 23
Almost as simple as 0+→ 0+:
5/2+
3/2+
3/2+
3718Ar
1.225(7) s
β+3719K
3/2+0.022%
2.07(11)%
97.99(14)%
isobaric analogue decay
strong branch to g.s.
polarization/alignment
mixed Fermi/Gamow-Teller
⇒ need ρ ≡ GAMGT/GV MF
to get SM prediction for correlation
parameters
get ρ from the comparative half-life: ρ2 =2Ft0
+→0+
Ft− 1
QEC : ±0.003%
BR: ±0.14%
Ft = 4562(28) ⇒
t1/2: ±0.57%
ρ = 0.5874(71)
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The β+-decay of 37K
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 23
Almost as simple as 0+→ 0+:
5/2+
3/2+
3/2+
3718Ar
1.225(7) s
β+3719K
3/2+0.022%
2.07(11)%
97.99(14)%
isobaric analogue decay
strong branch to g.s.
polarization/alignment
mixed Fermi/Gamow-Teller
⇒ need ρ ≡ GAMGT/GV MF
to get SM prediction for correlation
parameters
get ρ from the comparative half-life: ρ2 =2Ft0
+→0+
Ft− 1
QEC : ±0.003%
BR: ±0.14%
Ft = 4562(28) ⇒
t1/2: ±0.57%
ρ = 0.5874(71)
The lifetime limited the Ft value
and hence precision of ρ
and hence the SM predictions
of the correlation parameters
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The β+-decay of 37K
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 23
Almost as simple as 0+→ 0+:
5/2+
3/2+
3/2+
3718Ar
1.225(7) s
β+3719K
3/2+0.022%
2.07(11)%
97.99(14)%
isobaric analogue decay
strong branch to g.s.
polarization/alignment
mixed Fermi/Gamow-Teller
⇒ need ρ ≡ GAMGT/GV MF
to get SM prediction for correlation
parameters
get ρ from the comparative half-life: ρ2 =2Ft0
+→0+
Ft− 1
QEC : ±0.003%
BR: ±0.14%
Ft = 4562(28) ⇒
t1/2: ±0.57%
ρ = 0.5874(71)
The lifetime limited the Ft value
and hence precision of ρ
and hence the SM predictions
of the correlation parameters
so we measured the lifetime
at the CI:
a 4.4× improvement:
t1/2 =1236.51
± 0.47±0.83 ms
P. Shidling et al., Phys. Rev. C 90, 032501(R) (2014)
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Angular distribution of a 32
+→ 3
2
+decay
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 24
dW ∼ 1 + aβν~pe·~pνEeEν
+ bΓm
Ee+
~I
I·
[
Aβ
~peEe
+Bν
~pνEν
+D~pe×~pνEeEν
]
Correlation Expectation
β − ν correlation: aβν = 0.6580(61)
Fierz interference parameter: bFierz = 0 (sensitive to scalars and tensors)
β asymmetry: Aβ = −0.5739(21)
ν asymmetry: Bν = −0.7791(58)
Time-violating D coefficient: D = 0 (sensitive to imaginary couplings)
...
a β−recoil observable Rslow ∼1−aβν−2calign/3 − (Aβ−Bν)
1−aβν−2calign/3 + (Aβ−Bν)= 0
specific to our geometry
Recall: measurements of these correlations to . 0.1%complement collider experiments and test the SM
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Angular distribution of a 32
+→ 3
2
+decay
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 24
dW ∼ 1 + aβν~pe·~pνEeEν
+ bΓm
Ee+
~I
I·
[
Aβ
~peEe
+Bν
~pνEν
+D~pe×~pνEeEν
]
Correlation Expectation
β − ν correlation: aβν = 0.6580(61) → 0.6668(18)
Fierz interference parameter: bFierz = 0 (sensitive to scalars and tensors)
β asymmetry: Aβ = −0.5739(21) → −0.5719(7)
ν asymmetry: Bν = −0.7791(58) → −0.7703(18)
Time-violating D coefficient: D = 0 (sensitive to imaginary couplings)
...
a β−recoil observable Rslow ∼1−aβν−2calign/3 − (Aβ−Bν)
1−aβν−2calign/3 + (Aβ−Bν)= 0
specific to our geometry
Recall: measurements of these correlations to . 0.1%complement collider experiments and test the SM
(data in hand for improved branching ratios)
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E.g.: Right-handed currents
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 25
The Electroweak Interaction: SU(2)L×U(1) ⇒ W±L , Z, γ
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E.g.: Right-handed currents
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 25
The Electroweak Interaction: SU(2)L×U(1) ⇒ W±L , Z, γ
Built upon maximal parity violation:
HSM = GF Vud e(γµ − γµγ5)νe u(γµ − γµγ5)d
Vector P |Ψ〉 = −|Ψ〉
Axial − vector P |Ψ〉 = +|Ψ〉
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E.g.: Right-handed currents
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 25
The Electroweak Interaction: SU(2)L×U(1) ⇒ W±L , Z, γ
Built upon maximal parity violation:
HSM = GF Vud e(γµ − γµγ5)νe u(γµ − γµγ5)d
Vector P |Ψ〉 = −|Ψ〉
Axial − vector P |Ψ〉 = +|Ψ〉
low-energy limit of a deeper SU(2)R×SU(2)L×U(1) theory?
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E.g.: Right-handed currents
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 25
The Electroweak Interaction: SU(2)L×U(1) ⇒ W±L , Z, γ
Built upon maximal parity violation:
HSM = GF Vud e(γµ − γµγ5)νe u(γµ − γµγ5)d
Vector P |Ψ〉 = −|Ψ〉
Axial − vector P |Ψ〉 = +|Ψ〉
low-energy limit of a deeper SU(2)R×SU(2)L×U(1) theory?
⇒ 3 more vector bosons: W±R , Z ′
Simplest extensions: “manifest left-right symmetric” models
only 2 new parameters: W2 mass and a mixing angle, ζ
|WL〉 = cos ζ|W1〉 − sin ζ|W2〉
|WR〉 = sin ζ|W1〉+ cos ζ|W2〉
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RHCs would affect correlation parameters
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 26
Aβ =−2ρ1+ρ2
(√35 − ρ
5
)
Bν =−2ρ1+ρ2
(√35 + ρ
5
)
and Rslow = 0
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RHCs would affect correlation parameters
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 26
In the presence of new physics, the angular distribution
of β decay will be affected.
Aβ =−2ρ1+ρ2
(√35 − ρ
5
)
→ −2ρ1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
− ρ(1−y2)5(1+y2)
]
Bν =−2ρ1+ρ2
(√35 + ρ
5
)
→ −2ρ1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
+ ρ(1−y2)5(1+y2)
]
and Rslow = 0 → y2
where x ≈ (ML/MR)2 − ζ and y ≈ (ML/MR)
2 + ζ
are RHC parameters that are zero in the SM.
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RHCs would affect correlation parameters
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 26
In the presence of new physics, the angular distribution
of β decay will be affected.
Aβ =−2ρ1+ρ2
(√35 − ρ
5
)
→ −2ρ1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
− ρ(1−y2)5(1+y2)
]
Bν =−2ρ1+ρ2
(√35 + ρ
5
)
→ −2ρ1+ρ2
[
(1−xy)√
3(1+x2)5(1+y2)
+ ρ(1−y2)5(1+y2)
]
and Rslow = 0 → y2
where x ≈ (ML/MR)2 − ζ and y ≈ (ML/MR)
2 + ζ
are RHC parameters that are zero in the SM.
Again, goal must be . 0.1% to have an impact
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Thank you, AMO physicists!!
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 27
Atomic methods have opened up a new vista in precision workand provide the ability to push β decay measurements to . 0.1%
laser-cooling and trapping (magneto-optical traps)
sub-level state manipulation (optical pumping)
characterization/diagnostics (photoionization)
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Thank you, AMO physicists!!
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 27
Atomic methods have opened up a new vista in precision workand provide the ability to push β decay measurements to . 0.1%
laser-cooling and trapping (magneto-optical traps)
σ−
σ+
I
σ−
σ+
σ−
σ+
I
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Thank you, AMO physicists!!
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 27
Atomic methods have opened up a new vista in precision workand provide the ability to push β decay measurements to . 0.1%
laser-cooling and trapping (magneto-optical traps)
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Thank you, AMO physicists!!
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 27
Atomic methods have opened up a new vista in precision workand provide the ability to push β decay measurements to . 0.1%
laser-cooling and trapping (magneto-optical traps)
Traps provide a backing-free, very cold (. 1 mK), localized
(∼ 1 mm3) source of isomerically-selective, short-lived
radioactive atoms
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Thank you, AMO physicists!!
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 27
Atomic methods have opened up a new vista in precision workand provide the ability to push β decay measurements to . 0.1%
laser-cooling and trapping (magneto-optical traps)
Traps provide a backing-free, very cold (. 1 mK), localized
(∼ 1 mm3) source of isomerically-selective, short-lived
radioactive atoms
Detect ~pβ and ~precoil
⇒ deduce ~pν event-by-event!! ⇐
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The TRINAT lab
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 28
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The measurement chamber
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 29
Shake-off e− detection
know decay occured from trap
Better control of OP beams
less heating, higher P
Bquad → BOP quickly: AC-MOT
better duty cycle, higher polar-
ization
Increased β/recoil solid angles
better statistics
Stronger E-field (one day. . . )
better separation of charge
states, higher statistics
...
z
x
229µm thickBe foil
(anti)Helmholtz
coils
ScintillatorBC408
90 mm
Light
Ele
ctr
on
MC
P
Pola
rization
axis
Dete
ction
axis
Recoil
MC
P
Electrostatic
hoops
LightSi-strip detector
40x40mm2x300µmSiC substrate
254µm thick
Mirror with
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Outline of polarized experiment
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 30
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Outline of polarized experiment
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 30
Helmholtz
D2 MOT
anti-
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Outline of polarized experiment
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 30
20mF −2=
Helmholtz
D1OP
~F = ~I + ~J
P1/2
S1/2σ±
1−1
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Outline of polarized experiment
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 30
E-field
MC
PK
+
Helmholtz
D1OP
photoionization
20mF −2=
~F = ~I + ~J
P1/2
S1/2σ±
355 nm
1−1
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Atomic measurement of P
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 31
Deduce P based on a model of the excited state populations
P1/2
mF
S1/2
0 2
σ±
−2= −1 1
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Atomic measurement of P
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 31
Deduce P based on a model of the excited state populations
P1/2
mF
S1/2
0 2
σ±
−2= −1 1
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Polarization error budget
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 32
∆P [×10−4] ∆T [×10−4]Source
σ− σ+ σ− σ+
Systematics
Initial alignment 3 3 10 8Global fit vs. average 2 2 7 6Uncertainty on sout3 1 2 11 5Cloud temperature 2 0.5 3 2Binning 1 1 4 3Uncertainty in Bz 0.5 3 2 7Initial polarization 0.1 0.1 0.4 0.4Require I+ = I− 0.1 0.1 0.1 0.2
Total systematic 5 5 17 14
Statistics 7 6 21 17
Total uncertainty 9 8 27 22
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Polarization error budget
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 32
∆P [×10−4] ∆T [×10−4]Source
σ− σ+ σ− σ+
Systematics
Initial alignment 3 3 10 8Global fit vs. average 2 2 7 6Uncertainty on sout3 1 2 11 5Cloud temperature 2 0.5 3 2Binning 1 1 4 3Uncertainty in Bz 0.5 3 2 7Initial polarization 0.1 0.1 0.4 0.4Require I+ = I− 0.1 0.1 0.1 0.2
Total systematic 5 5 17 14
Statistics 7 6 21 17
Total uncertainty 9 8 27 22
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Polarization error budget
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 32
∆P [×10−4] ∆T [×10−4]Source
σ− σ+ σ− σ+
Systematics
Initial alignment 3 3 10 8Global fit vs. average 2 2 7 6Uncertainty on sout3 1 2 11 5Cloud temperature 2 0.5 3 2Binning 1 1 4 3Uncertainty in Bz 0.5 3 2 7Initial polarization 0.1 0.1 0.4 0.4Require I+ = I− 0.1 0.1 0.1 0.2
Total systematic 5 5 17 14
Statistics 7 6 21 17
Total uncertainty 9 8 27 22
⇒ 〈Pnucl〉 = 99.13(8)%
(c.f. neutrons: 99.7(1)% [PERKEOII], 99.3(3)% [UCNA])
and
〈Talign〉 = −0.9767(25)
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Scintillator spectra — June 2014
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 33
Just the raw data; a slight lower-energy cut to get rid of 511s
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Scintillator spectra — June 2014
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 33
Requiring a shake-off e− ⇒ decay occured from trap!
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Scintillator spectra — June 2014
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 33
Requiring a ∆E coincidence ⇒ remove γs
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Scintillator spectra — June 2014
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 33
Put in all the basic analysis cuts ⇒ clean spectrum!!
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Energy Spectrum Compared to GEANT4
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 34
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Asymmetry Measurement (briefly)
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 35
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Asymmetry Measurement (briefly)
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 35
Aobs(Ee) =1− S(Ee)
1 + S(Ee), where S(Ee) ≡
√
r−1 (Ee)r+2 (Ee)
r+1 (Ee)r−2 (Ee)
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Asymmetry Measurement (briefly)
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 35
Aobs(Ee) =1− S(Ee)
1 + S(Ee), where S(Ee) ≡
√
r−1 (Ee)r+2 (Ee)
r+1 (Ee)r−2 (Ee)
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Aβ Error Budget
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 36
Source Corr Uncert [×10−4]
Backgrounds 1.0013 7
Trap parameters position 4
velocity 5
temp, width 1
Thresholds/cuts ∆E pos 5
∆E energy agreement 2
∆E threshold 1
E threshold 0.3
G4 phys list 4
Shake-off e− TOF 3
E +∆E 1
E calibration 0.1
Total systematics 12
Statistical 13
Polarization 5
Total uncertainty 18
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Impact of Aβ Measurement
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 37
In terms of CKM unitarity, our Aβ result improved Vud by nearly a
factor of five: |Vud| = 0.981+12−10 → 0.9745(25).
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Impact of Aβ Measurement
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 37
In terms of CKM unitarity, our Aβ result improved Vud by nearly a
factor of five: |Vud| = 0.981+12−10 → 0.9745(25).
In terms of right-handed currents, our result is the best nuclear limit:
MWR> 351 GeV (in minimal left-right symmetric models)
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Impact of Aβ Measurement
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 37
In terms of CKM unitarity, our Aβ result improved Vud by nearly a
factor of five: |Vud| = 0.981+12−10 → 0.9745(25).
In terms of right-handed currents, our result is the best nuclear limit:
MWR> 351 GeV (in minimal left-right symmetric models)
Analysis of Fierz and second-class currents (E-dependent
observables) to be finished soon
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Summary
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 38
The SM is fantastic, but not our “ultimate” theory
There are many exciting avenues to find more a complete model
Nuclear approach: precision measurement of correlation
parameters
Penning trap + RIB CI = cool physics
largest open-area Penning trap especially suited for β-delayed
proton decays
will search for scalar currents via aβν and bFierz
(AC-)MOT + opt. pumping = cool physics
extremely precise, high nuclear polarization: 〈P 〉 = 99.13(8)%best nuclear limit on MWR
> 351 GeV (at ζ = 0).
on the way to a 0.1% measurement of Aβ and other
(un)polarized correlations
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The Mad Trappers/Thanks
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 39
TAMU: S. Behling, E. Bennett,
Y. Boran, B. Fenker, M.
Mehlman, J. Patti, P. Shidling
+ TAMU/REU undergrads
+ ENSICAEN interns
TRINAT: J.A. Behr, A. Gorelov, L. Kurchananov,
K. Olchanski, K.P. Jackson, . . .
D. Ashery, I. Cohen M. Anholm, G. Gwinner
Funding/Support: DE-FG02-93ER40773, ECA ER41747
TAMU/Cyclotron Institute
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The Mad Trappers/Thanks
Dan Melconian Tel Aviv ColloquiumApr 23, 2017
– 39
TAMU: S. Behling, E. Bennett,
Y. Boran, B. Fenker, M.
Mehlman, J. Patti, P. Shidling
+ TAMU/REU undergrads
+ ENSICAEN interns
TRINAT: J.A. Behr, A. Gorelov, L. Kurchananov,
K. Olchanski, K.P. Jackson, . . .
D. Ashery, I. Cohen M. Anholm, G. Gwinner
Funding/Support: DE-FG02-93ER40773, ECA ER41747
TAMU/Cyclotron Institute
And thank you for your
attention!