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PANDA at FAIR Facility for Antiproton and Ion Research

PANDA at FAIR Facility for Antiproton and Ion Research. Herbert Orth GSI Darmstadt. p. p. Quantum chromodynamics at short distances a S << 1. Example:. jet production in pp-collisions at = 1.8 TeV. (Fermilab). perturbative treatment.

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PANDA at FAIR Facility for Antiproton and Ion Research

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  1. PANDA at FAIR Facility for Antiproton and Ion Research Herbert Orth GSI Darmstadt

  2. p p Quantum chromodynamics at short distances aS<< 1 Example: jet production in pp-collisions at = 1.8 TeV (Fermilab) perturbative treatment quantitative description of the experimental cross section over 10 orders of magnitude by perturbative QCD! jet transverse energy

  3. q q gluon (g) q q Transition from the perturbative to the non-perturbative regime of Quantum Chromodynamics (QCD) perturbative QCD: aS<< 1 non-perturbative QCD: aS 1 hadrons: baryons, mesons models, lattice QCD quarks, gluons one gluon exchange

  4. Challenging problems in non-perturbative QCD • 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? • Do glueballs (ggg) and hybrids (qqg) exist?  New experimental approach: antiproton beams up to 15 GeV/c

  5. FAIR Facility for Antiproton and Ion Research SIS 100 SIS 300 GSI as of today CBM HESR Super-FRS PP Elec.Cooler PANDA Atom. Phys. CR+RESR FLAIR NESR

  6. detector features: measurement and identification of , e , , , K, p, p high rate capability fast trigger scheme High Energy Storage Ring (HESR) and Detector Concept N = 1011 p p-injection 32 2 1 - - L 2 10 cm s = p 1.5 15 GeV c = - p 4 5 - - p/p p/p 10 10 = - HESR electron cooler universal detector PANDA circumference 540 m max. bending power 50 Tm p

  7. glueballs (ggg) hybrids (ccg) J/ spectroscopy confinement hidden and open charm in nuclei strange and charmed baryons in nuclear field inverted deeply virtual Compton scattering CP-violation (D/ - sector) Physics program at the High Energy Storage Ring (HESR) New proposals: ASSIA, PAX (pol. target; pol. p – beams)

  8. confinement potential Quantumelectrodynamics (QED) Quantumchromodynamics (QCD) Positronium (e+e–) Charmonium ( c c ) Masse / MeV binding energy meV ionisation energy 4100 terra incognita 0 3P2(~3940) 1S0 3900 3P1(~3880) -1000 1D2 3P0(~3800) 3P2 3S1 1P1 1S0 3D2 3P1 3700 3P0 -3000 3500 3300 -5000 0.1nm 3S1 3100 1S0 -7000 1fm Positronium 2900 Charmonium

  9. e+e- interactions: only 1-- states formed other states populated in secondary decays (moderate mass resolution) production of 1,2 formation of 1,2 pp reactions: all states directly formed (very good mass resolution) comparison e+e- versus pp Crystall Ball E 760 (Fermilab) sm (beam) = 0.5 MeV

  10. charmonium spectroscopy: testing confinement unique window to study interplay of perturbative and non-perturbative effects • energy levels, widths, decay modes  details of QQ interaction non-perturbative effects open problems in J/ spectroscopy: • search for c'-state (seen Belle e.o.) • confirm 1P1-state • measure transition rates • identify states above DD threshold • confinement potential spin dependend ? advantage pp: direct formation of all states

  11. only 10 (QQ) states in 3 – 4 GeV/c2 Glueballs 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  less mixing, width  100 MeV mixing with (qq) and (QQ) excluded for exotic states (e.g., JPC = 2+-) C.J. Morningstar and M. Peardon, PRD60 (1999) 034 509 decay mode: 2+-   ( l = 2)

  12. Hybrids e.g. 1-+  c + ()l=0 (C. Michael, hep-lat/0207017) J/ +  e+e- light quark hybrids: candidates: JPC = 1–+ at 1.4 GeV/c2 – JPC = 1–+ at 1.6 GeV/c2 0– charmed hybrids: 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

  13. Strangesess Neutron Number three-dimensional nuclear chart with strangeness degree of freedom • strange and • doubly strange • nuclei • YN-interaction

  14. Double Hypernucleus Spectroscopy double hypernuclens production detector scheme Rates: applying K-trigger: 3 • 105 stopped ¯ /d ¯(dss) p(uud)  (uds) (uds) detected g-transitions:  100 / d keV-resolution !!

  15.  ( D+  f ) –  ( D–  f ) to ACP =  ( D+  f ) +  ( D–  f ) 2.5 ·109 D pairs/year  2.5 ·107 reconstructed D, /year CP-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 ; expected ACP 10-3 HESR: copious production of D-mesons for L = 2 · 1032 cm-2s-1 2 years of data taking to achieve 3s statistical significance

  16. g* g pQCD wide angle Compton scattering: non-perturbative QCD p g Identical diagram (reversed) exclusive annihilation : p g Access to Generalized Parton Distributions factorization into hard amplitude (calculable in perturbative QCD) and soft amplitude (information on parton distributions) • clear experimental signature; both baryons in ground state A. Freund et al, PRL 90 (2003) 092001 • cross section:   2.5 pb (at | u |, | t |  s  10 GeV2) O (103) events per month

  17. The PANDA detector central detector and forward spectrometer detector features: • tracking of charged particles • measurement and PID of g, e, m, p, K, p, p • high rate capability • sophisticated and fast trigger scheme

  18. Target pipe Target Spectrometer Muon hodoscope Solenoid Magnet coil Ecal Forward DIRC Minidrift Ecal p Straw chamber Barrel DIRC Si vertex detector Magnet yoke TOF Barrel

  19. Forward Spectrometer TOF Ecal Hcal Minidrift Gas Rich Muon chambers Dipole magnet yoke Coils

  20. The PANDA colaboration 41 Institutes (33 Locations) from 10 Countries:Austria - Germany - France - Italy - Netherlands - Poland - Russia - Sweden - U.K. - U.S. IKP Jülich I + II U Katowice LANL Los Alamos U Mainz TU München U Münster BINP Novosibirsk U Pavia Paris Orsay U of Silesia U Torino Politechnico di Torino U & INFN Trieste U Tübingen U & TSL Uppsala ÖAdW Vienna SINS Warsaw U Bochum U Bonn U & INFN Brescia U Catania U Cracow GSI Darmstadt TU Dresden JINR Dubna I + II U Erlangen NWU Evanston U & INFN Ferrara U Frankfurt LNF-INFN Frascati U & INFN Genova U Glasgow U Gießen KVI Groningen

  21. Plan view of the PANDA detector

  22. FAIR: Facility for Antiproton and Ion Research

  23. General FAIR slides

  24. Key Technical Features • Cooled beams • Rapidly cycling superconducting magnets FAIR:Facility for Antiproton and Ion Research 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 Storage and Cooler Rings • Radioactive beams • e – A collider • 1011 stored and cooled 0 - 14.5 GeV • antiprotons

  25. research areas: FAIR Facility for Antiproton and Ion Research • 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

  26. synergy effect: parallel operation of physics programs

  27. FAIR and its members France FZ-Jülich Finnland Spain Russia Sweden UK Italy GSI Observ. USA Obs. EU FAIR Council (Representatives of Institutions) Obs. India Project Management Finnland Obs. China FAIR Project GSI UK Russia France INDIA Italy Resources, Finances, Manpower and Hardware Contributions China Demands of the Project towards partners Sweden FZ-Jülich

  28. The PANDA Detector target spectrometer forward spectrometer straw tubetracker mini driftchambers muon counter DIRC: Detecting InternallyReflectedCherenkov light iron yoke Solenoidal magnet electromagneticcalorimeter micro vertexdetector

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