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antiP roton A nnihilation at DA rmstadt

antiP roton A nnihilation at DA rmstadt . Physics programme Quark confinement : Charmonium spectroscopy Excited gluons : Exotic hybrid mesons & glueballs Nucleon spin puzzle: transverse quark spin distribution functions in the nucleon Generalised parton distributions (in the nucleon)

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antiP roton A nnihilation at DA rmstadt

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  1. antiProton Annihilation at DArmstadt • Physics programme • Quark confinement: Charmonium spectroscopy • Excited gluons: Exotic hybrid mesons & glueballs • Nucleon spin puzzle: transverse quark spin distribution functions in the nucleon • Generalised parton distributions (in the nucleon) • Time-like nucleon formfactors • Modifications of hadrons in the nuclear medium • Double Hypernuclei • Antiproton facility : HESR & PANDA • Timelines FAIR UK community @ DL, 25/01/06

  2. Broad range of high-intensity secondary beams Radioactive nuclei Antiprotons Cooler and storage rings Parallel operation Facility for Antiproton and Ion Research SIS 100 SIS 300 SIS 18 PANDA HESR Collector ring FAIR UK community @ DL, 25/01/06

  3. PANDA physics programme Charmonium spectroscopy Exotics: charmed hybrids & heavy glueballs Time-like form factors Medium modificationsof charmed mesons Drell-Yanprocesses Hard exclusiveprocesses CP-violation(D &  - sector) Hypernuclei FAIR UK community @ DL, 25/01/06

  4. Strong interaction physics: QCD vs QED QED: QCD: FAIR UK community @ DL, 25/01/06

  5. Running strong coupling constant Particle Physics Nuclear Physics FAIR UK community @ DL, 25/01/06

  6. q q Lattice QCD  Confinement Distance between Quarks [fm] G. Bali et al.,hep-lat/0003012 FAIR UK community @ DL, 25/01/06

  7. Charmonium spectroscopy –a high-precision testing ground for confinement • Direct formation of charmonium in pbarp • Experimental tasks • find c‘ (21S0) state • confirm hc(11P1) state • measure transition rates • identify states above DbarD threshold • Refine confinement potential(spin dependence?) • Challenge for lattice QCD FAIR UK community @ DL, 25/01/06

  8. P P ψ‘ S χc S J/ψ Charmed Hybrids - theory • Lattice-QCD: • S-potential from one-gluon exchange • P-potential from excited gluon flux • Charmed hybrids expected atmHcc ~ 4.2 - 4.5 GeV/c2 • Light charmed hybridscould be narrow, if open charm decays are inaccessible or suppressed V(R)/GeV Hcc 4 DD 3.5 3 R/r0 2 1 <r2> and rBreakup FAIR UK community @ DL, 25/01/06

  9. Charmed hybrids - experiment Quantum number rules for quark-antiquark pair:- JPC = 0– + 0++ 1– – 1+ – 2++ … Allowed combinations JPC = 0– – 0+ – 1– + 2+ – … Not-allowed: exotic Combine with S=1 for quarks to get: Flux tube model: 1st excited state of flux tube has J=1 JPC = 0-+ 0+-1+- 1-+2-+ 2+- exotic (Exotic mesons are not generated when S=0) FAIR UK community @ DL, 25/01/06

  10. Antiproton momentum [GeV/c] 0 2 4 6 8 10 12 15 ΛΛ ΣΣ ΞΞ ΩΩ DD ΛcΛc ΣcΣc ΞcΞc ΩcΩc Two body thresholds DsDs Quark molecules qqqq ccqq Gluonic excitations nng,ssg ccg Hybrids exotic charmonium nng,ssg ccg Hybrids+Recoil ggg,gg Glueball ggg Glueball+Recoil conventional charmonium qq Mesons light qq π,ρ,ω,f2,K,K* cc J/ψ, ηc, χcJ 1 2 3 4 5 6 Mass [GeV/c2] Charmed Hadrons @ PANDA FAIR UK community @ DL, 25/01/06

  11. Light glueballs: candidate f0(1500), 0++; =110MeV no flavour blind decay mix with neighbouring scalar mesons Heavy glueballs flavour blind decay charmed final states! only a few charmed mesons around 3-4 MeV/c2 (less mixing!) Exotic heavy glueballs (no mixing) m(2+-) = 4140(50)(200) MeV m(0+-) = 4740(70)(230) MeV Search for heavy glueballs @ PANDA Morningstar & Peardon, PRD60(1999)34509Morningstar & Peardon, PRD56(1997)4043 FAIR UK community @ DL, 25/01/06

  12. Crystal Barrel f0(1500) What is needed experimentally? • Gluon-rich environment • Proton-antiproton annihilation • Precision resonance scan • Cooled antiproton beam • High luminosity • All quantum numbers measured • Large acceptance detector • High statistics samples • Several years of beamtime FAIR UK community @ DL, 25/01/06

  13. Nucleon structure: The spin puzzle COMPASSRHIC Gluon orbitalangular momentum(in principle accessible through GPDs) Gluon polarisationpositive (HERMES)negative (SMC) HERMESCOMPASSPANDAJLab-upgrade Quark spin  0.25 Quark orbitalangular momentum(accessible throughGPDs) Transversity HERMES, COMPASSFNAL, PANDA,PAX FAIR UK community @ DL, 25/01/06

  14. Parton distributions Leading twist Chirally odd directlyaccessible in Drell-Yan T-odd FAIR UK community @ DL, 25/01/06

  15. Cross section depends on elementary process Measured as a function of polar angle  and azimuthal angle  Direct access to quark distribution functions(no fragmentation function involved) Complementary to Deep Inelastic Scattering (DIS) Drell-Yan processes FAIR UK community @ DL, 25/01/06

  16. Unpolarised DY  Boer-Mulders DF h1┴ (PANDA@ HESR) Drell-Yan processes and parton distributions Single or double polarisation DY transversity h1(PAX @ HESR) FAIR UK community @ DL, 25/01/06

  17. Hard scale:large s ~ 10 GeV2 and │t│~ s, or large pT Soft part can be separated and parameterised by Generalised Parton Distribution amplitudes Experimental problem:large hadronic background (reject e.g. 00kinematically) Hard exclusive processes:Generalised Parton Distributions (GPD) Crossed channel (time-like) Compton Scattering FAIR UK community @ DL, 25/01/06

  18. Goals: To measure time-like FF from threshold up to high s = q2 in one experiment(reduced systematic error) To compare with space-like FFs (pQCD at large s?) PANDA: Wide kinematical range Large solid angle coverage Large statistics High-quality measurement of both GE and GM Time-like proton form factors Crossed channel : FAIR UK community @ DL, 25/01/06

  19. HADES & CBM Pseudoscalar &vector mesons , ω, Φ PANDA Extension to charm sector p- 25 MeV p p+ K+ K 100 MeV K- D D- 50 MeV D+ A. Hayashigaki, PLB 487 (2000) 96 Hadron mass shifts in the nuclear medium FAIR UK community @ DL, 25/01/06

  20. Strangess Neutron Number Hypernuclei:Extension of the Nuclear Chart … understanding the YN interaction FAIR UK community @ DL, 25/01/06

  21. 10 9 8 7 Protons 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 Neutrons Hypernuclei 3rd dimension of nuclear chart (strangeness) New: high resolution γ-Spectroscopy with Ge-Detectors FAIR UK community @ DL, 25/01/06

  22. K+K Trigger 3 GeV/c Secondary Target Production of double Hypernuclei Ξ- Ξ-(dss)p(uud)Λ(uds)Λ(uds) FAIR UK community @ DL, 25/01/06

  23. High Energy Storage Ring (HESR) FAIR UK community @ DL, 25/01/06

  24. TOF stop Drift or wire chambers Interaction point Target generator Muon counters EM and hadron calorimeters Solenoid Dipole RICH • Tracking of charged particles • Identification of γ, e±, μ±, π±, K±, p, anti-p • High rate capability • Fast trigger scheme FAIR UK community @ DL, 25/01/06

  25. pellets or clusters TOF stop coil barrel DIRC StrawsorTPC MVD mini drift chambers beam EMC electro magnetic calorimeter diskDIRC FAIR UK community @ DL, 25/01/06

  26. Timelines • FAIR contract signed by participating countries by 2006 • PANDA technical design report 2007/8 • PANDA commissioning 2012/13 in Phase II of FAIR construction • Data taking 2013… FAIR UK community @ DL, 25/01/06

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