LHC:
HUNT
FOR
DARK
MATTER
Teru
kiKam
on1),2)
1) Mitch
ell Institu
te for Fu
nd
amen
tal Physics an
d A
stronom
y, Texas A
&M
Un
iversity 2) W
CU
Collid
er Physics R
esearch, K
yun
gpook
Nation
al Un
iversity
1
Sean Connery
as Marko R
amius
Sum
mary
TerukiKam
on2
OOU
TL
INE
33
1)Dark M
atter and SUSY
2)LH
C & CMS D
etector3)
Re-discoveries ��SU
SY
PrologueThe
LHC
startedtaking
datafrom
proton-protoncollisions
ata
center-of-mass
energyof
7TeV
onM
arch30,
2010and
became
theenergy
frontierm
achineto
leadto
discoveriesof
newparticles.
TheStandard
Model
(SM)
iscurrently
welltested
upto
~100GeV,but
isexpected
tobreak
downin
theTeV
domain
wherenew
physicsshould
occur.Thisis
preciselythe
domain
thatwe
willstudyat
theLH
C.
New
Physics at CM
S
hhttp
://fac
ulty.p
hysic
s.tam
u.e
du
/kam
on
/rese
arch
/Co
smo
log
y_at_Co
llide
rs/h
ttp://fa
cu
lty.ph
ysics.ta
mu
.ed
u/ka
mo
n/re
sea
rch/L
HC
ph
en
o/
Phys. Lett. B 505 (2001) 161
Phys. Lett. B 538 (2002) 121
Phys. Lett. B 611 (2005) 223
Phys. Lett. B 618 (2005) 182
Eur. Phys. J. C46 (2006) 43
Phys. Lett. B 639 (2006) 46
Phys. Lett. B 649 (2007) 73
Phys. Rev. Lett. 100 (2008) 231802
Phys. Rev. D
79 (2009) 055002hep-ph/1008.3380, accepted for publication in Phys. R
ev. D (2010)
3
TA
MU
-KN
U P
hen
oP
rojects
Today,I
focuson
theoreticalmotivation
tosearch
forSU
SYdark
matter
andshow
aexperim
entalreadiness
ofthe
CMS
detectorfor
2011run.
We
havebeen
workingon
howto
determine
cosmologically-consistent
collidersignals.
Beloware
thelist
ofpapers.
4 3 2 11splitting norm
al matter and dark m
atter apart–
Another C
lear Evidence of Dark M
atter –(8/21/06)
Dark M
atter(G
ravitational Lensing)
Ordinary M
atter(N
ASA’s C
handra XO
bservatory)
time
Approxim
ately the sam
e size asthe M
ilky Way
Dark
Matter in
the U
niverse
TerukiKam
on4
yy
PPC at the LH
C
Th
e Un
iverseD
o w
e k
no
w th
e co
nte
nt o
f the
un
ive
rse?
TerukiKam
on5
PPC at the LH
C
Wilkinson M
icrowave A
nisotropy Probe (WM
AP):�
DM
= 23%W
hat is the dark matter?
An elem
entary particle?
CCa
n it b
e o
ne
of th
e kn
ow
n p
article
s?LL
et’s ch
eck o
ut!
It Doesn’t M
atter.R
ight, it doesn’t shake hand with anyone easily. Tw
o dark m
atter clusters (in blue) are just passing each other. It is a long-lived
(stable)object.
It’s a Cold M
atter.Yes, it is a “relativistically” slow
ly moving (“cold”) object.
4
It’s an Invisible Matter.
Right, it doesn’t respond to your flash light.
This means it is a neutralobject.
So, It’s a ���
����
��
�
��
��
�(C
DM
).
Pro
perties o
f Cold
Dark
Matter
TerukiKam
on6
PPC at the LH
C
Quarks,electron,m
uon,tauparticles,and
forcecarriers
cannot
bethe
darkm
atter,sincetheir
interactionsare
strongerthan
whatw
eexpect.
Neutrinos
can,buttheyhave
otherproblems.
XX
XX
XX
XX
XX
XX
XXXXTerukiKam
on7
PPC at the LH
C
CD
M in
Th
e Sta
ndard
Model?
We need an new idea beyond
the Standard Model.
Any guidance?
�e.g.,
Supersymmetry
(SUSY)
Texa
s-style SU
SY
Hu
ntin
g
TerukiKam
on8
PPC at the LH
C
© S. K
amon
SU
SY
is:
a)
Su
persym
metrized
Sta
ndard
Model
(“ Dem
ocra
tic”so
lutio
nbetw
eenFerm
ion
san
dB
oso
ns);
b)
An
elegan
tso
lutio
nto
solve
the
pro
blem
asso
ciated
with
the
Higgs
mass;
Su
persym
metry
(SU
SY
)
+
Unification!
c)B
eau
tifully
con
nectin
gth
eSta
ndard
Model
with
an
ultim
ate
un
ificatio
nof
the
fun
dam
enta
lin
teractio
ns;
d)
Cosm
olo
gically
con
sistent
with
aD
ark
Matter
can
did
ate
–sta
ble
neu
tralin
o.
01� ~
Neutral
Lightest
SUSY
Particle typeTerukiK
amon
9gg
PPC at the LH
C
ME
NU
~S
PE
CIA
LS
~
*Dark E
nerg
y Pow
er Drin
k .. $73-
Ch
ef’s choice
*Dark M
atter Sand
wich
……
$23-
Neu
tral, long-lived
*Atom
ic Soup
……
……
……
. $4-
All elem
ents in
one
No
, Sir. B
ut w
ith
ne
utra
lino
?
ME
NU
Ia
mh
un
gry.
Ca
nyo
um
ak
eth
eD
Msa
nd
wich
with
an
yS
tan
da
rdM
od
el
pa
rticle?
“Da
rk M
atte
r” Sa
nd
wich
10Teruki K
amon
Probing Supersymm
etric Connection w
ith DM
1111
LHC
annihilation
combination
Pro
bin
g E
arly U
niv
erse
I am
travelin
g a lo
t …
1
2
3
0
1212
Mitch
ell In
stitute
for
Fu
nd
am
en
tal P
hysic
s a
nd
Astro
no
my, Te
xas
A&
M U
nive
rsity
WWO
RL
D P
HY
SIC
S A
GE
NC
Y
High Energy Physics Special Agent
TERU
KI K
AM
ON
WPA C
ode: XXXX XXXX XXXX 0007(D
ark Matter H
unter)C
ode Nam
e: SUSY
Affiliations: TAMU
, KN
UO
ccupation: Professor
Current Status: AC
TIVE, TravelingC
ountry: Europe, Japan, Korea, U
SA
DO
B: unknow
nLocation: unknow
n
Ialw
ayshave
tocarry
onJapanese
passport,U
Sresidency
card,Texas
A&
Mfaculty
IDcard,
Texasstate
driverslicense
card,andK
oreanresidency
card.1313
© S. K
amon
My D
au
ghter’s Im
age o
f Dad …
27 km ring
14
Large H
adro
nC
ollid
er (LH
C)
�A
ccelerato
rto
provid
e7
-TeV
(*)pro
ton
bea
ms
from
aH
bottle;
�B
ig(2
7k
mcircu
mferen
ce);�
Cool
(1.9
Ku
sing
60
ton
sof
Liq
uid
Heliu
m);
�H
ot
(synch
rotro
nra
dia
tion
,in
med
ia);
�E
norm
ou
san
dvery
soph
isticated
magn
eticsystem
;�
Pow
erful
(14
TeV
(*)co
llision
s,Tota
lm
agn
eticen
ergysto
redis
that
of
Aero
bu
sA
380
flying
at
700
km
/h
).
Th
e LH
C is :
TerukiKam
on15
PPC at the LH
C
(*) 3.5 TeV/beam in 2010
Pow
erful to
Crea
te Massive O
bjects
TerukiKam
on16
PPC at the LH
C
14TeV
Proton-Proton Collisions
Proton Collisions 1 billion (10
9) Hz
Bunch C
rossing 40 million (10
6) Hz
7.5 m (25 ns)
On
e “disco
very” event in
10
,00
0,0
00
,00
0,0
00
14,0
00 x
mass o
f pro
ton
(14
TeV
) = C
ollisio
n E
nergy
Pro
ton
s fly at 9
9.9
99999%
of sp
eed o
f light
2808 =
Bu
nch
es/B
eam
100 b
illion
(10
11) =
Pro
ton
s/B
un
ch
Parton Collisions
New
Particles 1 Hz to 10 m
icro (10-5) H
z(H
iggs, SUSY, ....)
Discovery P
ath
at th
e LH
C
TerukiKam
on17
PPC at the LH
C
CosmologicallyConsistent Signals
10 trillion collisions
Disco
veries with
“Missin
g ET
”Standard M
odel’s CV
1973B
.S.��N
eutralcurrent@
CE
RN
SPS(400
GeV
p)1983
M.S.–
“W/Z
discovery”@
CE
RN
SppS(540
GeV
)1995
Ph.D.–
“Topdiscovery”
@Ferm
ilabTevatron
(1.8TeV
)20??
Evidence
ofSUSY-like
newphysics
inthe
jets+
ME
Tfinalstate
attheL
HC
pp
pp
W�
e�
t�W
b
Missin
g E
T(M
ET
) -in
ferrin
g n
eu
trino
s
TerukiKam
on18
PPC at the LH
C
ME
T -
infe
rring
newp
hysic
s (if th
e d
ark m
atte
r is like a
he
avy n
eu
trino
.)
Cosm
ology�
LH
C = [E
xciting Motivation]�
[Right Place&
Timing]
��
�e
b
b�
�
eb
b�
�
�slashdet �
�0
��
pected
visiblep
pp
pp
��
��
��
��
�
��
�
[Ref.] M
issing E
T
TerukiKam
on19
PPC at the LH
C
slashp
Experimentally,
wemeasure
amom
entumim
balancein
transverseplane
andcall
it“m
issingtransverse
energy”(
or).
TE
miss
TE
Th
eC
MS
(21
mx
15m
x15
m,
12,5
00
ton
ne
s)is
on
eo
ftw
osu
pe
r-fast
&su
pe
r-sen
sitive
de
tecto
rs,co
nsistin
go
f15
he
av
ye
lem
en
ts,co
llectin
gd
eb
risfro
mth
eco
llision
an
dco
nve
rting
avisu
al
ima
ge
for
us.
“Pa
rticle”
Te
lesco
pe
at
CE
RN
vs.H
ub
ble
Sp
ace
Te
lesco
pe
ino
ute
rsp
ace
Com
pact M
uon
Solen
oid
Hubble Space Telescope
TerukiKam
on20
220
08
.09
.10
: First L
HC
Be
am
21
CM
S
AL
ICE
AT
LA
S
LH
Cb
pp
AL
ICE
AAAAAAAAAAAAAAAAAAAAAALLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
IIIIIIIIIIIIIIIIIIIIIIIIIICCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEEEEEEEEEEEEEEEE
AT
LA
S
14:22 pm
CM
S
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCMMMMMMMMMMMMMMMMMMMMMMMMMM
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS 19:20 pmC
MS
LH
Cb
17:59 pmLH
Cb
LH
C is B
ack
!(N
ov. 2
3, 2
00
9)
TerukiKam
on2222222222222222222
2.36 TeV…
12/06/20097
TeV…
3/30/20108
TeVin 2011-12?
20
09
.11
.23
: 90
0 GG
eV
Charged Particle M
ultiplicity
TerukiKam
on23
M=1.116 G
eV/c2
��=3.1 MeV/c
2M
=497.7 MeV/c
2
�=7.6 MeV/c
2
LHC is back!
&W
e are ready!!
���
� 0
��
p�
KK
��
��
��
�0s
K
JHEP 02 (2010) 041
Re
--Disc
ove
ries 2
00
9
7:467:46
7:157:50
9:1110:0812:46
12:3312:48
12:58
10:13
7:465
7:462
01
0.0
3.3
0: 7
TeV
24TerukiK
amon
Su
ng
hyu
n C
ha
ng
BBe
am
1(c.w
.)Be
am
2(c.c.w
.)
33
29
Ge
V3
50
0 G
eV
220
10
Ru
n (M
ar 3
0 ~
Oc
t 29
)
TerukiKam
on25
SSU
SY
Se
arc
he
s at C
MS
TerukiKam
on26
Itis
criticalto
understandthe
SMproduction
(e.g.,W
,Z,
top),since
theyare
oftendom
inantbackgrounds
fornew
particlesearches.
Iw
illgo
throughselected
topicson
theSM
analysesand
newparticle
searches:
1)D
ileptonresonances;W
andZ
bosons2)
Topquark
--------------------------------------------------------------------------------------3)
We
haveto
understandjets
–see
anexam
plein
“Searchfornew
quark-likeorgluon-like
particle:X� �
jj”4)
We
haveto
understandM
ET.5)
Rem
arkon
“particlephysics
andcosm
ology”
280 nb-1
1.1 pb-1
220
10
.08
.09
: First 1
pb
--11
(~80 x 109
pppcollisions)
1977��
�+�
–
1974J�
��
+�–
LH
C is p
ow
erfu
l en
ou
gh
to re
-disc
ove
r tho
se p
article
s in ~
4 m
on
ths.
TerukiKam
on27
1983Z�
�+�
–
WW a
nd
Z b
oso
ns
TerukiKam
on28
��
��
��
WW a
nd
Z in
�CC
ha
nn
el
�S
imu
ltan
eo
us
fitsto
ba
ckgro
un
ds
an
dsig
na
lc
on
tribu
tion
s.�
QC
Db
ackg
rou
nd
sha
pe
so
bta
ine
du
sing
data
.�
Ele
ctro
we
ak
ba
ckgro
un
dsh
ap
es
an
dsig
na
lfro
mM
C.
1.1
pb
-1
TerukiKam
on29
)4.2
(G
eV
20]
[
)1.2
(G
eV
9]
[
��
��
� �
T T
pZ
pW
WW a
nd
Z in
e C
ha
nn
el
�W
:75
%e
fficie
ncy
�Z
:9
0%
effic
ien
cy�
QC
Db
ackg
rou
nd
sha
pe
sfro
md
ata�
Ele
ctro
we
ak
ba
ckgro
un
da
nd
sign
alsh
ap
es
from
MC
TerukiKam
on30
1.1
pb
-1
)5.2
566.1
,442
.10(
GeV
20
]&
[
�� �
�
�
�
�T
pZ
W
22.9
pb
-1
TerukiKam
on31
AT
LA
Sa
rXiv:1
01
0.2
13
00
.32
pb
-12
25
0 W
’s, 17
9 Z
/�*’s ��
/�~
5%
CM
SS
oo
n2
.9 p
b-1
W a
nd
Z: R
esu
lts
TerukiKam
on32
WW a
nd
Z: to
wa
rd R
esu
lts with
35
pb
--11
TTo
p�
Pre
cise
SM
me
asu
rem
en
ts�
Gre
at
too
lto
ca
libra
ted
ete
cto
r(e
.g.,
jet
en
erg
ysc
ale
,b
-ta
gg
ing
effic
ien
cy)
�T
op
iso
ne
of
do
min
an
tB
Gs
inm
an
yn
ew
ph
ysics
sce
na
rios
(e.g
.,SU
SY
).�
Aw
ind
ow
ton
ew
ph
ysics
…
TerukiKam
on33
TTo
p DD
ilep
ton
:: Eve
nt D
ispla
y
VVe
rycle
an
ca
nd
idate
sitting
ina
reg
ion
wh
ere
we
expe
ct
very
littleb
ackg
rou
nd
!TerukiK
amon
34
μμ
+bb
+ M
ET
Ca
nd
idate
Eve
nt
z[cm
]
y [cm]
b1
b2
b2
b1
j
j
����
��
��
TE
•FF
ull se
lec
tion
ap
plie
d: Z
-bo
son
Ve
to, |M(��)-M
(Z)| >
15
Ge
V•
ME
T>
30
(20
) Ge
V in
ee, ��,
(e�) ; N
(jets)���
���T
> 3
0 G
eV
)
To
p DD
ilep
ton
: Re
sults
3.1
pb
-1
TerukiKam
on35
11
ttc
an
did
ates (5e�, 3ee
, 3��) ove
r a n
eg
ligib
le b
ackg
rou
nd
tttt _ arXiv:10
10
.59
94
, sub
mitte
d to
PL
B
w/o
N(je
ts)�����
•TTe
sting
with
KIN
em
atic (K
IN) m
eth
od
an
d M
atrix-ele
me
nt
We
igh
ting
Tech
niq
ue
(MW
T)
To
p DD
ilep
ton
: Re
sults
3.1
pb
-1
TerukiKam
on36
Co
nsiste
nt
with
top
pa
ir-pro
du
ctio
n(M
top
=1
72
.5G
eV
)�
Ma
ssm
ea
sure
me
nt
with
~4
0p
b-1
inle
pto
n+
jets+
ME
T.
TTo
p DD
ilep
ton
:: Re
sults
33.1
pb
-1
TerukiKam
on37
AT
LA
S?
??
CM
S1
01
0.5
99
4((P
LB
)3
.1p
b-1
��/�
~ 1
5%
TopLepton+Jets: Event D
isplay
Eve
nt p
asse
s all c
uts:
�1
hig
h-m
om
en
tum
ele
ctro
n�
sign
ifica
nt M
ET
����
�Ge
V�
4 h
igh
-pT
jets,
�tw
o o
f wh
ich w
ith g
oo
d/cle
ar b
-tag
s
mT (W
)��������
2
m(jj)�
102 GeV/c
2
m(jjj)�
208, 232 GeV/c
2
(for the two 3-jet com
binations) TerukiK
amon
38
e + jj
+ b
b +
ME
T C
an
did
ate E
ven
t
b1
b1
b2
b2
j1
j2
TE
j1
e
e
TTo
p L
ep
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L 105 (2010) 211801 or arXiv:1010.0203
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((Ab
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PPC at the LH
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“2011”
TerukiKam
on46
PPC at the LH
C
1)A
ninclusive
searchin
Jets+
MET
usingm
T2
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we
seean
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ecould
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am
assof
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thisis
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QCD
tt
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arXiv:0907.2713v1Alan J. B
arr and Claire G
wenlan
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Rouzbeh Allahverdi, B
haskar Dutta, Yudi Santoso
arXiv:0912.4329
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on47
PPC at the LH
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stFebruary•
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12thD
ecember
~200 days proton physicsLH
C status
Ro
ge
r Ba
iley’s talk
at LH
CC
(No
v 12
, 20
10
)
48
•
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icron emittance
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11protons/bunch•
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inal crossing angle
20
11
: “Re
aso
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ble
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ltima
te” N
um
be
rs
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6.4 x 1032
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12/11/10
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warnings
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s,problem
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TeV•
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ittance•
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, nominal crossing
angle
LHC
status49
(*) to be discussed at Cham
onix)
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ac
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LH
C P
hysic
s
TerukiKam
on50
88 Te
V
7 Te
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Co
nsiste
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http
s://twiki.c
ern
.ch/tw
iki/bin
/view
/CM
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lic/P
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sRe
sultsH
IGS
tan
da
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to L
HC
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ulty.p
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s.tam
u.e
du
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on
/rese
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ollid
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/h
ttttp:
aac
ultyty.p
hy
//fafa
TerukiKam
on51
remark
remark
r
refC
ollid
ers/L
HC
/
PPC at the LH
C
CB
S comedy “B
ig Bang T
heory”(Season 1 E
pisode 15)
52
Sum
mary
RRe
ma
rk: PP
CInterconnection betw
een Particle Physics and Cosm
ology
PPC 2011 at C
ERN
, June 14-18PPC
2012 at ???
TerukiKam
on53
CSI:
Su
persym
metry
at th
e LH
CC
olliderSceneInvestigation
SSu
mm
ary
TerukiKam
on54
LHC –
keep going!
FFY
I: ZZ
Ca
nd
idate
55
Nov. 8, 2010
Pb
-Pb
co
llision
2.7
6 Te
V/n
ucle
on
pa
ir(R
HIC
x 14
)
FFY
I: He
avy Ion
Co
llision
56