workshop jinr/bmbf18.jan.05, h.o. panda at fair facility for antiproton and ion research herbert...
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Workshop JINR/BMBF 18.Jan.05, H.O.
PANDA at FAIRFacility for Antiproton and Ion Research
Herbert OrthGSI Darmstadt
Workshop JINR/BMBF 18.Jan.05, H.O.
Quantum chromodynamics at short distances S << 1 Quantum chromodynamics at short distances S << 1
quantitative description of the experimental cross section over
10 orders of magnitude by perturbative QCD!
jet transverse energy
perturbative treatment
jet production in pp-collisions at = 1.8 TeV (Fermilab)s
p p
Example:
Workshop JINR/BMBF 18.Jan.05, H.O.
Transition from the perturbative to the non-perturbative regime of Quantum Chromodynamics (QCD)
Transition from the perturbative to the non-perturbative regime of Quantum Chromodynamics (QCD)
q
q q
qgluon (g)
quarks, gluonsone gluon exchange
hadrons:baryons, mesonsmodels, lattice QCD
perturbativeQCD: S << 1
non-perturbativeQCD: S 1
Workshop JINR/BMBF 18.Jan.05, H.O.
Challenging problems in non-perturbative QCDChallenging problems in non-perturbative QCD
• Do glueballs (ggg) and hybrids (qqg) exist?
New experimental approach: antiproton beams up to 15 GeV/c
• Why are quarks confined within hadrons?
• How are hadrons constructed from their constituents?
• What is the relation of parton degrees of freedom and the low energy structure of hadrons?
• What is the origin of hadron masses?
• How are hadrons modified when embedded in nuclei?
Workshop JINR/BMBF 18.Jan.05, H.O.
SIS 100
HESR
SIS 300
CBM
PP Super-FRS
Atom. Phys.
GSI as of today
Elec.CoolerPANDA
CR+RESR
NESRFLAIR
FAIRFacility for Antiprotonand Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
High Energy Storage Ring (HESR) and Detector ConceptHigh Energy Storage Ring (HESR) and Detector Concept
electron cooler
universal detector PANDA
p-injection
circumference 540 m
max. bending power 50 Tm
HESR
p
detector features:measurement and identification of, e , , , K, p, phigh rate capabilityfast trigger scheme
54p/p
cGeV151.5pp1s2cm32102L
1010p/p
N = 1011 p
Workshop JINR/BMBF 18.Jan.05, H.O.
Physics program at the High Energy Storage Ring (HESR)Physics program at the High Energy Storage Ring (HESR)
J/ spectroscopy confinement
hidden and open charm in nucleiglueballs (ggg)
hybrids (ccg)
strange and charmed baryons
in nuclear field
inverted deeply virtual Compton scattering
CP-violation (D/ - sector)
New proposals: ASSIA, PAX (pol. target; pol. p – beams)
Workshop JINR/BMBF 18.Jan.05, H.O.
Quantumelectrodynamics (QED)Quantumelectrodynamics (QED) Quantumchromodynamics (QCD)Quantumchromodynamics (QCD)
( )r
crV
hα−=
( )rV
r
( ) rKr
c
3
4rV S ⋅+α−=
h
( ) ∞→∞→ rforrV
confinement potential
( )rV
Masse / MeV
2900
3100
3300
3500
3700
3900
4100
( )3730DD
)3097(
)3686(')3770(''
)4040('''
)3525(hc )3510(1χ)3556(2χ
)3415(0χ
)3590('cη
)2980(cη
1D23D2
3P0(~3800)3P1(~3880)
3P2(~3940)
terra incognita
cc
Charmonium
1fm
Charmonium ( c c )Positronium (e+e–)
ionisation energy
binding energy meV
0
-1000
-3000
-5000
-7000
+e −e
Positronium
0.1nm1S0
1S0
1S0
3S1
3S11P1 3P1
3P0
3P2
Workshop JINR/BMBF 18.Jan.05, H.O.
comparison e+e- versus ppcomparison e+e- versus pp
e+e- interactions: only 1-- states formed other states populated in secondary decays (moderate mass resolution)
pp reactions: all states directly formed (very good mass resolution)
production of χ1,2
'ee →−+
2,1χ
/J−+ ee
formation of χ1,2
/J−+ ee
2,1pp χ→
Crystall Ball
E 760 (Fermilab)
m (beam) = 0.5 MeV
Workshop JINR/BMBF 18.Jan.05, H.O.
• energy levels, widths, decay modes
details of QQ interaction non-perturbative effects
charmonium spectroscopy: testing confinementcharmonium spectroscopy: testing confinement
unique window to study interplay of perturbative and non-perturbative effects
open problems in J/ spectroscopy:
• search for ηc'-state (seen Belle e.o.) • confirm 1P1-state • measure transition rates • identify states above DD threshold
advantage pp: direct formation of all states
confinement potential spin dependend ?
Workshop JINR/BMBF 18.Jan.05, H.O.
GlueballsGlueballs
characteristic feature of QCD: self-interaction among gluons
predicted masses: 1.5 - 5.0 GeV/c2
candidate: f0(1500): 0++; =110MeV no flavour blind decay mixing with neighbouring scalar meson states
search for higher lying glueball states
mixing with (qq) and (QQ) excluded for exotic states (e.g., JPC = 2+-)
less mixing, width 100 MeVonly 10 (QQ) states in 3 – 4 GeV/c2
C.J. Morningstar and M. Peardon,PRD60 (1999) 034 509decay mode: 2+- η ( l = 2)
Workshop JINR/BMBF 18.Jan.05, H.O.
predicted masses: 3.9 - 4.5 GeV/c2
lowest state: JPC = 1–+ (exotic)width: could be narrow (LGT: 10 MeV)preferred decays:(ccg) (cc) + X
light quark hybrids:
charmed hybrids:
candidates:JPC = 1–+ at 1.4 GeV/c2 η–
JPC = 1–+ at 1.6 GeV/c2 0–
Hybrids Hybrids )qgq( *
e.g. 1-+ χc + ()l=0 (C. Michael, hep-lat/0207017)
J/ + e+e-
Workshop JINR/BMBF 18.Jan.05, H.O.
Str
ange
sess
Neutron Number
three-dimensional nuclear chart with strangeness degree of freedomthree-dimensional nuclear chart
with strangeness degree of freedom
• strange and doubly strange nuclei• YN-interaction
Workshop JINR/BMBF 18.Jan.05, H.O.
Double Hypernucleus SpectroscopyDouble Hypernucleus Spectroscopy
double hypernuclens productiondouble hypernuclens production detector schemedetector scheme
¯(dss) p(uud) (uds) (uds) applying K-trigger: 3 • 105 stopped ¯ /ddetected -transitions: 100 / dkeV-resolution !!
Rates:
Workshop JINR/BMBF 18.Jan.05, H.O.
CP-violationCP-violation
• CP-violation observed in the s, b-sector• not sufficient to explain observed matter
CP-violation in c-sector? e.g. compare decay rates+−++ → KKD to −+−− → KKD
f f
; expected ACP 10-3 ( D+ f ) – ( D– f )
( D+ f ) + ( D– f ) ACP =
copious production of D-mesons
2.5 ·109 D pairs/year D 2.5 ·107 reconstructed D, /yearD
for L = 2 · 1032 cm-2s-1 2 years of data taking to achieve 3 statistical significance
HESR:
Workshop JINR/BMBF 18.Jan.05, H.O.
Access to Generalized Parton DistributionsAccess to Generalized Parton Distributions
Identical diagram
(reversed)
non-perturbative QCD
pQCD
( )t,,xE,H ξ
( )t,,xE~
,H~
ξ
p
p
factorization into hard amplitude (calculable in perturbative QCD)
and soft amplitude
(information on parton distributions)exclusive annihilation :→pp
wide angle Compton scattering:
• clear experimental signature;both baryons in ground state
• cross section: 2.5 pb
⇒−−⋅= 1s2cm32102Lfor
O (103) events per month
(at | u |, | t | s 10 GeV2)
A. Freund et al, PRL 90 (2003) 092001
Workshop JINR/BMBF 18.Jan.05, H.O.
detector features:
• tracking of charged particles
• measurement and PID of , e, , , K, p, p
• high rate capability
• sophisticated and fast trigger scheme
The PANDA detectorThe PANDA detector
central detector and forward spectrometer
Workshop JINR/BMBF 18.Jan.05, H.O.
Target SpectrometerTarget Spectrometer Target pipe
Muon hodoscope
Straw chamber
Si vertex detector
Ecal
Barrel DIRC
Magnet yoke
Solenoid Magnet coil
Ecal
Minidrift
Forward DIRC
p
TOF Barrel
Workshop JINR/BMBF 18.Jan.05, H.O.
Forward SpectrometerForward Spectrometer
Minidrift
Dipole magnet yokeMuon chambers
Ecal
Hcal
Gas Rich
Coils
TOF
Workshop JINR/BMBF 18.Jan.05, H.O.
41 Institutes (33 Locations) from 10 Countries:Austria - Germany - France - Italy - Netherlands - Poland - Russia - Sweden - U.K. -
U.S.
IKP Jülich I + IIU KatowiceLANL Los AlamosU MainzTU MünchenU MünsterBINP NovosibirskU PaviaParis OrsayU of SilesiaU TorinoPolitechnico di TorinoU & INFN TriesteU TübingenU & TSL UppsalaÖAdW ViennaSINS Warsaw
U BochumU BonnU & INFN BresciaU CataniaU CracowGSI Darmstadt TU DresdenJINR Dubna I + IIU ErlangenNWU EvanstonU & INFN FerraraU FrankfurtLNF-INFN FrascatiU & INFN GenovaU GlasgowU GießenKVI Groningen
The PANDA colaborationThe PANDA colaboration
Workshop JINR/BMBF 18.Jan.05, H.O.
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are needed to see this picture.
Plan view of the PANDA detectorPlan view of the PANDA detector
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIR: Facility for Antiproton and Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
General FAIR slides
Workshop JINR/BMBF 18.Jan.05, H.O.
Primary Beams
•1012/s; 1.5 GeV/u; 238U28+
•Factor 100-1000 over present in intensity•2(4)x1013/s 30 GeV protons•1010/s 238U73+ up to 25 (- 35) GeV/u
Secondary Beams
•Broad range of radioactive beams up to 1.5 - 2 GeV/u; up to factor 10 000 in intensity over present •Antiprotons 3 - 30 GeV
•Cooled beams•Rapidly cycling superconducting magnets
Key Technical Features
Storage and Cooler Rings
•Radioactive beams•e – A collider
•1011 stored and cooled 0 - 14.5 GeV
antiprotons
FAIR: Facility for Antiproton and Ion ResearchFAIR: Facility for Antiproton and Ion Research
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIRFacility for Antiproton and Ion Research
research areas:
• Nuclear Structure Physics and Nuclear Astrophysics with Radioactive Ion-Beams
• Hadron Physics with p - Beams
• Physics of Nuclear Matter with Relativistic Nuclear Collisions
• Plasma Physics with highly bunched Laser- and Ion-Beams
• Atomic Physics and Applied Science
• Accelerator Physics
Workshop JINR/BMBF 18.Jan.05, H.O.
synergy effect: parallel operation of physics programssynergy effect: parallel operation of physics programs
Workshop JINR/BMBF 18.Jan.05, H.O.
FAIR and its members
FAIR ProjectFrance
FZ-Jülich
Russia
INDIAItaly
Resources, Finances, Manpower and Hardware Contributions
Demands of the Project towards partners
UK
SwedenChina
GSI
FAIR Council(Representatives of Institutions)
France FZ-Jülich RussiaFinnland Spain UKSwedenGSI
Project Management
Italy
Finnland
Obs. EU
Obs. China
Obs. India
Observ. USA
Workshop JINR/BMBF 18.Jan.05, H.O.
Workshop JINR/BMBF 18.Jan.05, H.O.
The PANDA DetectorThe PANDA Detector
target spectrometer forward spectrometer
micro vertexdetector
electromagneticcalorimeter
DIRC:Detecting InternallyReflectedCherenkov light
straw tubetracker
mini driftchambers
muon counter
Solenoidalmagnet
iron yoke