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Exploring the Future: Goals of P-Pbar Experiment

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kieran-witt
24 diapositives · 345 Views · Nov 30, 2014

Explore the history of antimatter, from Dirac's equation to the discovery of antiparticles by Anderson in 1932. Learn how the Low Energy Antiproton Ring (LEAR) in the 1980s led to advancements in antiproton control and scattering studies. Discover the motivation behind LEAR experiments and the Physics program from 1983 to 1996. Dive into the future with the PANDA experiment, focusing on strong interaction, charmonium spectroscopy, and the search for new particles like glueballs and hybrids. Understand recent measurements in hadron physics and the role of PANDA in exploring new frontiers in charmonium. Join the seminar for a glimpse into the world of antimatter research.

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  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… In 1932, first antimatter or antiparticles were discovered by Carl D.Anderson: the Positron Since 1930: search for the possible constituents of antimatter

  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 1010 antiprotons with the 0.6 GeV/c momentum has been used Physics programme 1983 - 1996.

  6. Future experiments on p-p bar interactionPANDA experimentantiProton 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. data and interpretation • above DD threshold not • clear • recently discovered narrow • states Charmonium - positronium of QCD • confinement potential • narrow states (e.m. decay)

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

  12. Belle 304M B’s X(3872) ’ Belle, PRL91, 262001(‘03) PRL 91 (2003) 262001 Charmonium - new frontiers What is the X(3872)? • Charmonium 13D2 state? • D0D0* molecule? • Charmonium hybrid (ccg)?

  13. Charmonium - new frontiers • X(3872),Belle 09’2003, 1++, χc1´ or D0D* molecule • decays into J/ψπ+π-, J/ψπ+π-π0, J/ψγ, D0D* • Y(3940),Belle 09’2004, 23P1 or Hybrid? • decays into J/ψω • Y(4260), BaBar 06’2005, 1--, 23D1 (BaBar) or 43S1 (CLEO) or Hybrid • decays into e+e-, J/ψπ+π-, J/ψπ0π0, J/ψK+K- • X(3943), Belle 07’2005, 0-+, ηc´´ • decays into D0D* • Z(3934), Belle 07’2005, 2++, χc2´ • decays into γγ, DD • ψ(4320), BaBar 06’2006, Hybrid

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

  15. CBall E835 100 c1 1000 CBall ev./2 MeV E 835 ev./pb ECM 3500 3510 3520 MeV e+e- versus pp annihilations e+e- reactions: only 1-- states formed directly pp reactions: all states directly formed 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 JPC = 1-+ no cc mixing no decay DD/DD* Flux-tube model:  < 50 MeV pp: ~100-150 pb

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

  18. The PANDA Detector PANDA is a modular multi-purpose device: • nearly 4solid angle(partial wave analysis) • high rate capability (2·107 annihilations/s) • good PID(,e,,, K, p) • momentum resolution (~1%) • vertex info for D, K0S,(c= 317 mfor D±) • modular design (Hypernuclei experiments)

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

  20. The PANDA barrel and forward endcap EMC

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

  22. : the GSI future facility Facility for Antiproton and Ion Research • 5x1010 1.5 -15 GeV/c antiprotons

  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