anti Proton Annihilation at DArmstadt n Physics programme

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

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

PANDA physics programme Charmonium spectroscopy Exotics: charmed hybrids & heavy glueballs Time-like form factors Medium modifications of charmed mesons Drell-Yan processes Hard exclusive processes CP-violation (D & - sector) Hypernuclei Günther Rosner FAIR UK community @ DL, 25/01/06 3

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

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

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

Charmonium spectroscopy – a high-precision testing ground for confinement n n Direct formation of charmonium in pbarp Experimental tasks q q n n Günther Rosner find c‘ (21 S 0) state confirm hc(11 P 1) state measure transition rates identify states above Dbar. D threshold Refine confinement potential (spin dependence? ) Challenge for lattice QCD FAIR UK community @ DL, 25/01/06 7

Charmed Hybrids - theory n Lattice-QCD: q q n n S-potential from one-gluon exchange P-potential from excited gluon flux Charmed hybrids expected at m. Hcc ~ 4. 2 - 4. 5 Ge. V/c 2 Light charmed hybrids could be narrow, if open charm decays are inaccessible or suppressed Günther Rosner V(R)/Ge. V Hcc P 4 ψ‘ 3. 5 3 DD S χc R/r 0 J/ψ FAIR UK community @ DL, 25/01/06 1 2 <r 2> and r. Breakup 8

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 Flux tube model: 1 st excited state of flux tube has J=1 Combine with S=1 for quarks to get: JPC = 0 -+ 0+- 1 -+ 2+- exotic (Exotic mesons are not generated when S=0) Günther Rosner FAIR UK community @ DL, 25/01/06 9

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

Search for heavy glueballs @ PANDA n Light glueballs: q q q n Heavy glueballs q q n candidate f 0(1500), 0++; =110 Me. V no flavour blind decay mix with neighbouring scalar mesons flavour blind decay charmed final states! only a few charmed mesons around 3 -4 Me. V/c 2 (less mixing!) Exotic heavy glueballs (no mixing) q q m(2+-) = 4140(50)(200) Me. V m(0+-) = 4740(70)(230) Me. V Morningstar & Peardon, PRD 60(1999)34509 Morningstar & Peardon, PRD 56(1997)4043 Günther Rosner FAIR UK community @ DL, 25/01/06 11

What is needed experimentally? n n Gluon-rich environment q Proton-antiproton annihilation Precision resonance scan q Cooled antiproton beam q High luminosity All quantum numbers measured q Large acceptance detector High statistics samples q Several years of beamtime Günther Rosner Crystal Barrel FAIR UK community @ DL, 25/01/06 f 0(1500) 12

Nucleon structure: The spin puzzle COMPASS RHIC Gluon polarisation positive (HERMES) negative (SMC) Quark spin 0. 25 Gluon orbital angular momentum (in principle accessible through GPDs) Quark orbital angular momentum (accessible through GPDs) HERMES COMPASS PANDA JLab-upgrade Transversity HERMES, COMPASS FNAL, PANDA, PAX Günther Rosner FAIR UK community @ DL, 25/01/06 13

Parton distributions Leading twist Chirally directly accessible in odd Drell-Yan T-odd Günther Rosner FAIR UK community @ DL, 25/01/06 14

Drell-Yan processes n Cross section depends on elementary process n 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) n n Günther Rosner FAIR UK community @ DL, 25/01/06 15

Drell-Yan processes and parton distributions n Unpolarised DY Boer-Mulders DF h 1┴ (PANDA @ HESR) n Single or double polarisation DY transversity h 1 (PAX @ HESR) Günther Rosner FAIR UK community @ DL, 25/01/06 16

Hard exclusive processes: Generalised Parton Distributions (GPD) Crossed channel (time-like) Compton Scattering n n n Günther Rosner Hard scale: large s ~ 10 Ge. V 2 and │t│~ s, or large p. T Soft part can be separated and parameterised by Generalised Parton Distribution amplitudes Experimental problem: large hadronic background (reject e. g. 0 0 kinematically) FAIR UK community @ DL, 25/01/06 17

Time-like proton form factors Crossed channel : n Goals: q q n To measure time-like FF from threshold up to high s = q 2 in one experiment (reduced systematic error) To compare with space-like FFs (p. QCD at large s? ) PANDA: q q q Wide kinematical range Large solid angle coverage Large statistics Ø High-quality measurement of both GE and GM Günther Rosner FAIR UK community @ DL, 25/01/06 18

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

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

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

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

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

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

pellets or clusters TOF stop coil barrel DIRC Straws or TPC MVD mini drift chambers beam eter im r lo a c ic t ne electro mag EMC disk DIRC Günther Rosner FAIR UK community @ DL, 25/01/06 25

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