journée thématique ipn orsay, 2004 panda, a new detector for hadronic physics at gsi (fair)...
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Journée Thématique IPN Orsay, 2004
PANDA, a new detector forhadronic physics at GSI (FAIR)
Carsten Schwarz, GSI
●The FAIR facilityoHESR Storage ring for antiprotons
●Research with antiprotonsoScientific goalsoPANDA Detector
Journée Thématique IPN Orsay, 2004
Existing Facility (GSI)
Existing facility:UNILAC < 20 MeV/uSIS < 1-2 GeV/uESR < 0.8 GeV/u
Journée Thématique IPN Orsay, 2004
Facility for Antiproton and Ion Research FAIR
New facility:July 2002: positively evaluated by German Science Council
Feb 2003: positive decisionof BMBF (Ministry of Education & Research)
April 2004: 2nd call for LOIs
June 2004: Presentation of LOIsto International Steering committee(ISC-FAIR)
key tech. Features:
●cooled beams
●rapidly cycling superconducting magnets
Journée Thématique IPN Orsay, 2004
Facility for Antiproton and Ion Research FAIR
Primary beams:1012 1.5 GeV/u 238U28+
Factor 100-1000 over present in intensity
2-4 1013/s 30 GeV protons
1010/s 25-35 GeV/u 238U73+
Journée Thématique IPN Orsay, 2004
New Facility
Secondary Beams:Broad range of radioactive beams up to 1.5-2 GeV/uup to factor 10000 in intensityover present
Antiprotons 3(0) - 30 GeV1-2 107 /s
Storage and Cooler Rings:1011 stored and cooled0.8-15 GeV antiprotons
Radioactive beamse-A collider
Journée Thématique IPN Orsay, 2004
High Energy Storage Ring for antiprotons
ElectroncoolerE<8 GeV
Detector
Injection
HESR
High resol. Mode: L = 1031 cm-2 s-1 p/p < 10-5
High lum. Mode: L = 2·1032 cm-2 s-1 p/p < 10-4
Cooling: electron/stochasticPmax = 15 GeV/cLmax = 2·1032 cm-2 s-1
Ø < 100 mp/p < 10-5
internal target
Characteristics
70 m
185
m
Journée Thématique IPN Orsay, 2004
Scientific goals for p
Medium modificationsof D mesons and J/ in nuclei
Charmonium spectroscopy
Hybrids & Glueballs
CP violation
Hypernuclei
Journée Thématique IPN Orsay, 2004
Medium modifications of D and J/
pionic atoms
KAOS/FOPI
HESR
K
D
Vacuum nuclear medium= 0
+
-
K-
K+
D+
D-
25 MeV
100 MeV
50 MeV ?
Mass modifications of mesons
Continuation of present GSI physicsFOPI, KAOS, HADES, PANDA
Signal: medium modification ofproduction threshold,resonance widthe.g. ',
c2
Absorption cross section of J/ in nuclei (= 0).
PANDA
Journée Thématique IPN Orsay, 2004
Medium modifications of D and J/
Hayashigaki, Phys. Lett. B487 (2000) 96
●Mass of cc expected to change only little
●Lowering of D masses change widths of Charmonium states close to threshold
● (1D) : = 24 MeV
● (2S) : = 0.28 MeV● experiment:
● (1D) lepton pair spectroscopy (e+e-:
i=10-5)
● widths and yield of cc DD
Journée Thématique IPN Orsay, 2004
Medium modifications of D and J/
The expected signal:
●strong enhancement of the D meson crossection near threshold
●density () and temperature (T=0) is known
complementary to AA collisions
A.Sibirtsev, K. Tsushima, A.W. Thomas: Eur. Phys. J. A6 (1999) 351
Journée Thématique IPN Orsay, 2004
Charmonium spectroscopy
● Charmonium gives information about QCD confinement potential.
● Many states are still missing.● pp: direct population of all states.● HESR allows investigation of states above
DD threshold.● Cooled beams with p/p=10-5 allow high
precision scan of resonances.
3500 3520 MeV3510
CB
all
ev./
2 M
eV
100
ECM
CBallE835
1000
E 8
35
ev./
pb
c1
Journée Thématique IPN Orsay, 2004
Charmonium spectroscopy
Even on the ground state on the simplest parameters there are consistency problems
Five new measurements published 2002-2003,four by e+e- experiments
Journée Thématique IPN Orsay, 2004
Charmonium spectroscopy
3580 3600 3620 3640 3660 3680
CBALL 86(2S)→X
'c
3637.7±4.4 MeV
BELLE 02B→K (KSK+)
BELLE 03e+e-→J/ X
CLEO 03→KSK+
BABAR 03→KSK+
Mass (MeV)
New measurementsof mass are consistent!
tot
= (19 ± 10) MeV
Journée Thématique IPN Orsay, 2004
Charmonium spectroscopy
Open problems:
5 new measurements of c mass
States above DD thr. are not well established
'c unambiguously seen
h1c not confirmed
Journée Thématique IPN Orsay, 2004
Open charm
DsJ
*(2317)+
BABAR: PRL 90 242001 (2003)
Potential model
New observations
Old measurements
Unexpected surprises in the D
S Spectrum |cs>+c.c.
BABAR, Belle, CLEO-c
Journée Thématique IPN Orsay, 2004
Hybrids & Glueballs
Normal meson: 2 fermionsP = (-1)L+1
C = (-1)L+S
Excited glue: bosonic degree of freedom→ exotic quantum numbers eg. JPC=1-+, 0--, 0+-, 2+-...→ normal quantum numbers
Signal:exotic quantum numbers:
partial wave analysisnormal quantum numbers:
model comparison (LGT)
mixing with normal mesonscharm sector: few resonances
with small widths
qqg ggg
Hybrid Glueball
Meson
Journée Thématique IPN Orsay, 2004
Hybrids & Glueballs
Ex
ot i
c l
igh
t q
q
Ex
ot i
c c
c
1 -- 1 -+
0 2000 4000MeV/ c 2
10 -2
1
10 2
In the light meson spectrum exotic statesoverlap with conventional states
In the cc meson spectrum the density of states is lower and therefore the overlap
Journée Thématique IPN Orsay, 2004
Hybrids & Glueballs
Crystal Barrel
Non-qq candidates come with similarstrength like qq resonances in pp.
LQCD: mH = 4.2-4.5 GeV
PANDA: non exotic QN 10000/day exotic QN 100/day
detection rate
Filter for exotic QN 1-+:hybridJ/X X=
Journée Thématique IPN Orsay, 2004
Hybrids & Glueballs
Morningstar und Peardon, PRD60 (1999) 034509Morningstar und Peardon, PRD56 (1997) 4043
Journée Thématique IPN Orsay, 2004
Hybrids & Glueballs
Recently, different experiments have reported evidences of an exotic baryon with K+n quantum numbers: +(1540); ~ 18 MeV
The+(1540) state cannot be a 3-quarks state. Its minimal quark content is (uudds)
n → K (K+n)
T.Nakano et al.,Phys. Rev. Lett. 91,012002 (2003).
KXe →(Kp)Xe
V.V. Barmin et al.,hep-ex/0304040.
d (Kp)(K+n)
S. Stepanyan et al.,hep-ex/0307018.
Theorists [R.Jaffe & F.Wilzek (hep-ph/0307341), M.Karliner & Lipkin (hep-ph/0307343)] predict charm and bottom analogues of the +(1540):
c+ with mass 2985 ± 50 MeV
p could be a good tool to search for multiquark states
Journée Thématique IPN Orsay, 2004
Detector
Formation of ' and decay in muons
' µ+ µ -
'J/ + X
µ +µ -
similarly for electrons:→for large angles calorimeter needed.
Acceptance of detector is guided by simulations
Journée Thématique IPN Orsay, 2004
Tracking: Micro Vertex Detector (MVD)
2 mio. forward pixels100 x 150 m
beam pipe
pelle
t pi
pe
Readout: ASICs (ATLAS/CMS) 0.37% X0
or pixel one side - readout other side (TESLA)
Layers 5 barrel, 5 end capthickness 200 mthick. 5 layers 1-3.5 % X
0
resolution z 25 ... 100 m
7.2 mio. barrel pixels50 x 300 m
Journée Thématique IPN Orsay, 2004
Tracking: Straw Tubes
9000 straw tubes 15 double layers 2-14 layers are with skew angle (4-9o) tube length : 1.5 m tube diameters : 4, 6, 8 mmx,y = 150 m z = 1 mm
Example event pp → → 4K
Journée Thématique IPN Orsay, 2004
PID: DIRC (Cerenkov)
less space than aerogel costs of calorimeterno problems with field
BaBar@SLAC
Journée Thématique IPN Orsay, 2004
PID: DIRC (Cherenkov)
K eff.
miss-id.
reaction pp at s = 3.6 GeV/c2
degree
degr
ee
Journée Thématique IPN Orsay, 2004
Forward RICH
Search for good combination radiator photon detector magnetic field
4 10 cm
Aerogel (n=1.02) visible light PD HPD
C6F
14 (n=1.24) CsI coated photo cath.
( < 210 nm = UV)
Proximity "focusing"compact detector
Journée Thématique IPN Orsay, 2004
Calorimeter
PbWO4
Length = 17 X0
APD readout (in field)(E) = 1.54% / E½ + 0.3% (PM)
pp J/ +
Journée Thématique IPN Orsay, 2004
Pellet target
Existing at WASA
Frozen hydrogen pelletsTarget density: 1016 cm-2
pellet spread: ±0.04o
pellet rate: 70000/spellet vel.: 60 m/spellet size: 20-40 µm
similar target is being constructed at ANKE@COSY
option: cluster jet targetbut 1014 cm-2 and pumps close to beam line
1 mm
Journée Thématique IPN Orsay, 2004
Realization / Costs
Civil Construction ~ 225 MAccelerator Components ~ 265 MInstrumentation and Major Detectors ~ 185 M(PANDA Detector ~ 32 M) ~ 675 M↗1000
M(including FTE
+ newprojects)Year 2005 major money flow
Year 2012 commissioning
(PANDA)
Year 2013 regular data taking (PANDA)
Journée Thématique IPN Orsay, 2004
Participating institutes with representatives in CB
U BochumU BonnU & INFN BresciaU CataniaU CracowGSI Darmstadt TU DresdenJINR Dubna I + IIU ErlangenNWU EvanstonU & INFN FerraraU FrankfurtLNF-INFN FrascatiU & INFN GenovaU GlasgowU Gießen
KVI Groningen IKP Jülich I + IIU KatowiceLANL Los AlamosU MainzTU MünchenU MünsterBINP NovosibirskU PaviaU of SilesiaU TorinoPolitechnico di TorinoU & INFN TriesteU TübingenU & TSL UppsalaÖAdW ViennaSINS Warsaw
40 Institutes (32 Locations) from 9 Countries:Austria - Germany - Italy - Netherlands - Poland - Russia - Sweden - U.K. - U.S.
Journée Thématique IPN Orsay, 2004
Conclusions
Thanks to the new FAIR HESR facility p will be used to produce...
high resolution spectroscopy with p-beam in formation experiments:E Ebeam
high yields of gluonic excitations: glueballs, hybrids, multi-quark states (100 pb - 1 b)
in medium effects by implanting mesons inside the nuclear medium
hyperon-antihyperon taggable beams