1. Goals of future p-pbar experiment Elmaddin Guliyev Student Seminar, KVI, Groningen University 6 November 2008

2. Outline 1. History antiparticles production of antiparticles in accelerator 2. Low Energy Antiproton Ring experiment 3.Future p-pbar PANDA experiment

3. The history of antimatter begins in 1928 with a young physicist named Paul Dirac and a strange mathematical equation… Since 1930: search for the possible constituents of antimatter In 1932, first antimatter or antiparticles were discovered by Carl D.Anderson: the Positron

4. In the early 1980s, Simon van der Meer at CERN invented a technique that now made it possible to accumulate, concentrate and control antiproton beams. And in 1982 the Low Energy Antiproton Ring (LEAR) appeared: it could decelerate the antiprotons coming from the proton synchrotron to different intermediate energies, down to a few MeV.

5. Motivation of LEAR experiments: study antiproton – proton scattering search for meson resonances glueballs, hybrids. For LEAR operation a pulses of 10 10 antiprotons with the 0.6 GeV/c momentum has been used Physics programme 1983 - 1996.

6. Future experiments on p-p bar interaction PANDA experiment antiProton ANnihilations at DArmstadt

7. Goal of PANDA experiment: - study strong interaction in the regime of strong coupling - charmonium spectroscopy - search for glueballs and hybrids in the charmonium mass region - study single and double hypernuclei

8. Hadron Physics – tests of QCD

9. Hadron Spectroscopy

10. Charmonium - positronium of QCD confinement potential narrow states (e.m. decay) confinement potential narrow states (e.m. decay) data and interpretation above DD threshold not clear recently discovered narrow states data and interpretation above DD threshold not clear recently discovered narrow states

11. Charmonium - positronium of QCD New measurements published by e+e- experiments:  c

12. Belle, PRL91, 262001(‘03) ’’ Belle X(3872) PRL 91 (2003) 262001 304M B’s Charmonium - new frontiers What is the X(3872)?  Charmonium 1 3 D 2 state?  D 0 D 0 * molecule?  Charmonium hybrid (c c g)?

13. Charmonium - new frontiers X(3872), Belle 09’2003, 1 ++, χ c1 ´ or D 0 D* molecule –decays into J/ψπ + π -, J/ψπ + π - π 0, J/ψγ, D 0 D * Y(3940), Belle 09’2004, 2 3 P 1 or Hybrid? –decays into J/ψω Y(4260), BaBar 06’2005, 1 --, 2 3 D 1 (BaBar) or 4 3 S 1 (CLEO) or Hybrid –decays into e + e -, J/ψπ + π -, J/ψπ 0 π 0, J/ψ K + K - X(3943), Belle 07’2005, 0 -+, η c ´´ –decays into D 0 D * Z(3934), Belle 07’2005, 2 ++, χ c2 ´ –decays into γγ, DD ψ(4320), BaBar 06’2006, Hybrid

14. Open Charm Spectroscopy - D sJ D sJ spectroscopy: The analog of hydrogen atom D sJ spectroscopy: The analog of hydrogen atom * DsDs DsDs D sJ (2317) D sJ (2460) D sJ (2536) D sJ (2573 ) Striking discrepancies of recently discovered states (B factories, CLEO&BaBar) DK threshold effects? 4-q state? Striking discrepancies of recently discovered states (B factories, CLEO&BaBar) DK threshold effects? 4-q state? PANDA: near-threshold scan -> M,  PANDA: near-threshold scan -> M, 

15. e + e - versus pp annihilations e + e - reactions: only 1 -- states formed directly pp reactions: all states directly formed e + e - reactions: only 1 -- states formed directly pp reactions: all states directly formed 35003520 MeV3510 CBall ev./2 MeV 100 E CM CBall E835 1000 E 835 ev./pb  c1 Example: e + e - :  > 3.8 MeV pp:  = 0.19 +/- 0.13 MeV

16. Charmed Hybrids Lattice QCD: cc-hybrid M~4.2-4.5 GeV exotic J PC = 1 -+ no cc mixing no decay DD/DD * Flux-tube model:  < 50 MeV pp:  ~100-150 pb Lattice QCD: cc-hybrid M~4.2-4.5 GeV exotic J PC = 1 -+ no cc mixing no decay DD/DD * Flux-tube model:  < 50 MeV pp:  ~100-150 pb

17. G.S. Bali, Eur. Phys. J. A19 1 (2004) Glueballs Glueballs: the ultimate evidence for confinement… Glueballs: the ultimate evidence for confinement… Lattice QCD: rich glueball spectrum odd-balls ~4-5 GeV Lattice QCD: rich glueball spectrum odd-balls ~4-5 GeV

18. PANDA is a modular multi-purpose device: nearly 4  solid angle(partial wave analysis) high rate capability(2 · 10 7 annihilations/s) good PID( , e, , , K, p) momentum resolution(~1%) vertex info for D, K 0 S,  (c  = 317  m for D ± ) modular design(Hypernuclei experiments) Detector The PANDA Detector

19. solenoid (1 T)‏ dirc muon counter emc BEAM mvd tpc rich emc hadronc Target spectrometer Forward spectrometer PANDA detector

20. The PANDA barrel and forward endcap EMC

21. AntiProton Beam Proton (hydrogen gas) Interaction Point MicroVertex Detector

22. : the GSI future facility 5x10 10 1.5 -15 GeV/c antiprotons Facility for Antiproton and Ion Research

23. Conclusion Strong interaction studied in the regime of strong coupling Hadron spectroscopy will be possible at high excitation energy Charmonium spectrum and transitions will be analysed We will search for exotic states: hybrid states, glue-balls 1.

24. Literature: 1. Burcham and Jobes, Nuclear and Particle Physics, 1995, England 2. Physics Performance Report for PANDA, August 2, 2008