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PANDA physics with the use of antiproton beam

PANDA physics with the use of antiproton beam . V . Mochalov (IHEP, Protvino ) o n behalf of the PANDA collaboration. content. Introduction : FAIR, HESR & PANDA ( FAIR – F acility for A ntiproton and I on R esearch) ( HESR – H igh E nergy S torage R ing)

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PANDA physics with the use of antiproton beam

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  1. PANDA physics with the use of antiproton beam V. Mochalov (IHEP, Protvino) on behalf of the PANDA collaboration

  2. content V. Mochalov, Hadron structure 2013 • Introduction: FAIR, HESR & PANDA • (FAIR– Facility for Antiproton and Ion Research) • (HESR – High Energy Storage Ring) • (PANDA– antiProtonANnihilation at DArmstadt) • PANDA Detector • Hadron Physics • Charmonium • Open charm • Light exotics • Baryon studies • Conclusion

  3. pbar production : • proton Linac 50 MeV • accelerate p in SIS18/SIS100 • produce pbar on target • collect pbar in CR, • cool in RESR (not in Start Version) • inject pbar into HESR • 100m V. Mochalov, Hadron structure 2013

  4. HESR V. Mochalov, Hadron structure 2013

  5. V. Mochalov, Hadron structure 2013 antiProton ANnihilation at DArmstadt A very high intensity beam with momentum from 1.5 GeV/c up to15 GeV/c on a proton fixed target (or nuclear target), average interaction rate 20 MHz, s from 2.25 up to 5.46 GeV It will continue and extend the successful physics program performed in the past at facilities like LEAR at CERN and the antiproton accumulator ring at FNAL

  6. PANDA DETECTOR tracking V. Mochalov, Hadron structure 2013

  7. PANDA DETECTOR identification V. Mochalov, Hadron structure 2013

  8. PANDA DETECTOR calorimetry V. Mochalov, Hadron structure 2013

  9. PANDA DETECTOR CHARCTERISTICS V. Mochalov, Hadron structure 2013 Capability to detect events with high rate (upto2 · 107 s-1interactions) Nearly 4π solid angle for large acceptance and PWA p±, K±, p±, e±, μ±, γidentification Displaced vertex detection – vertexinformationforD, KS,,  (c = 317 m for D±) Photon detectionfrom10 MeVto 10 GeV Efficienteventselection & goodmomentumresolution Detector will be described in the Marco Destefanis Talk

  10. PANDA PHYSICS OVERVIEW • Hadron spectroscopy • light mesons • charmoniumand open charm • search for exotics • baryons (double strange, charmed) • baryon anti-baryon production • Mesons in nuclei • Hypernuclei • EMP processes • Time-like electromagnetic form factors of the proton, • Transverse quark distributions will be described in the Marco DestefanisTalk V. Mochalov, Hadron structure 2013

  11. PANDA PHYSICS documents Update on the Physics Perspectives of PANDA • Spectroscopy of X, Y and Z states • Nucleon Structure from electromagnetic processes in PANDA • Physics of doubly strange systems • Production of S=-2 systems at FAIR V. Mochalov, SPIN-2012, IHEP spin program

  12. PANDA advantages: Possibility to create all states V. Mochalov, SPIN-2012, IHEP spin program

  13. Width measurement accuracy In the formation mode, masses and widths will be measured very accurately. It depends only on the beam parameters, not on the detector resolution, which determines only be the sensitivity to a given final state • Typical resolution: e+e- Crystal Ball: ~ 10 MeV ppFermilab: 240 keV ppPANDA: ~30-100 keV V. Mochalov, SPIN-2012, IHEP spin program

  14. Lattice QCD calculations 2012 lightest supermultiplet first excited supermultiplet other states (cc) L. Liu et al, arXiv: 1204.5425v1 [hep-ph] V. Mochalov, Hadron structure 2013

  15. Charmonium spectroscopy All charmoniumstates below open charm threshold observed All charmonium 1-- states observed Above open charm threshold: • many expected states not observed • many unexpected observed V. Mochalov, Hadron structure 2013

  16. PDG 2012 states V. Mochalov, Hadron structure 2013

  17. Conventional states: masses and width of ηc Data from Xiaoyan SHEN Talk at PANDA-meeting V. Mochalov, Hadron structure 2013

  18. Conventional states: hc width V. Mochalov, Hadron structure 2013

  19. PDG 2012 charmonium states V. Mochalov, Hadron structure 2013

  20. X(3872) V. Mochalov, Hadron structure 2013

  21. X(3872) discussion V. Mochalov, Hadron structure 2013 Breaks isospin in thedecays J/(->+−) – isospinviolation, J/(->+−0) → itisnot charmonium? Withinm < 1 MeVofthe DD* threshold S-wavemolecularstate? Large cross-section – itischarmoniumχc1(2P)?- (S.S. Gershtein, A.K. Likhoded, A.V. Luchinsky Phys.Rev. D74 (2006) 016002) - Formoleculeshouldbelowerbyfactor 10^2) Probablytwonarrowstates (CDF) Charge partner? – not in themasswindowneither in width

  22. V. Mochalov, Hadron structure 2013 X(3872) maybe a mixtureofusualcharmoniaχc1(2P)-calculated and molecule DD* () +χ_c1(2P) it is desireable to find mechanism to suppress χ_c1(2P) production. X(4260) and X(3872) havethe same nature? BESIII found (?) radiationdecay

  23. X(3872) scan V. Mochalov, Hadron structure 2013

  24. X(3872) puzzle The mass value of M = 3871.68 ± 0.17 MeV is .05±0.27 MeV lower than the sum of masses of the D0 and D*0 PANDA will measure width at the level of 0.1 MeV with 20 keV accuracy. V. Mochalov, Hadron structure 2013

  25. Z(4430) Study (and others) • Can not be charmonium (charged) • it must contain a cc-bar pair due to its decay into ψ’π+. • decay into J/ψπ+ is not observed • Other states (3900) • 4025(?) V. Mochalov, Hadron structure 2013

  26. Z(4430) at PANDA The ψ(2S)π Dalitz plot for the reaction with Z decaying into ψ(2S)π The ψ(2S)π invariant mass (blue). Combinatoricsbackground in red

  27. Search for z(4430) partners PANDA can investigate the Z+(4430) even further by switching to studies of the Z+(4430) in formation mode. Due to the charge of the Z, this is only possible by annihilating the antiprotons on a neutron in a deuterium target. Experimentally it is no problem to replace the hydrogen gas, for example in a pellet target, with deuterium. The reaction to look for in would then be: With decay

  28. Production of exotic charmonium hybrid V. Mochalov, Hadron structure 2013

  29. OPEN CHARM V. Mochalov, Hadron structure 2013

  30. OPEN CHARm in panda(2317) V. Mochalov, Hadron structure 2013

  31. V. Mochalov, SPIN-2012, IHEP spin program

  32. Ds*(2317) threshold scan V. Mochalov, SPIN-2012, IHEP spin program

  33. “Light sector” exotics V. Mochalov, Hadron structure 2013

  34. Study of exotics including PWA But !!! V. Mochalov, Hadron structure 2013 Study of channel: J/ψ→ϕϕγ→ (K+K-) (K+K-) γ Large isospin breaking: η(1440) and f0(980) showed incompabilityBESIII: PRL 108 (2012) 182001

  35. LQCD Glueball spectrum lightest NARROW (50VeV) oddballs above open charm threshold m(2+-) ~ 4230 MeV m(0+-) ~ 4780 MeV

  36. Antihyperon-hyperon production V. Mochalov, Hadron structure 2013

  37. Pair Hyperon production Almost full symmetry for the particles an anti-particles gives unique possibility to measure CP effects minimizing systematics V. Mochalov, Hadron structure 2013

  38. BARYON spectroscopy (Erik Thomé PHD) V. Mochalov, Hadron structure 2013

  39. Hyperon spin properties V. Mochalov, Hadron structure 2013 • Measurement of spin observables – spin density matrix (polarization) an correlation parameters • CP violation • In decay width Γ(Y→Bπ) and conjugate decay Γ(¯Y → ¯Bπ) • Much more with polarization: • the asymmetry parameter α quantifies the tendency of the decay baryon to be preferably emitted in the hyperon spin direction • With hyperon decay to another decay additional CP asymmetries can be achieved

  40. Polarization study in V. Mochalov, Hadron structure 2013

  41. Study of

  42. CP asymmetry and statistics

  43. Other physics • Nucleon Structure from electromagnetic processes • The extension of form factor measurements to the so called time-like region separating the magnetic and electric components can be performed with an order of magnitude improvement • clean identification of dileptons can be used to measure a whole series of other electromagnetic processes like for example Drell-Yan in order to get access to the transverse spin structure functions. • Study hyper-nuclei (including - double) and charm-nuclei, when the strange (one or two) or charmed particle "implanted" into the nuclei instead of the usual nucleon • Hadrons in nuclear matter • These items will be reported tomorrow by Marco Destefanis

  44. PANDA at NUPECC community V. Mochalov, Hadron structure 2013 • The long-range plan of NUPECC for the European hadron physics community of the year 2010 identifies three major areas in hadron physics as prime goals for the future. Those are: • ‘Hadron Spectroscopy’ • ‘Hadron Structure’ and • ‘Hadronic Interactions’. • The PANDA experiment by design can contribute to all of these

  45. conclusions V. Mochalov, Hadron structure 2013 The PANDA experiment will have a great potential for discovery in addition to the LHC at a relatively high-energy antiprotons and, at the same time, due to the energy scan mode will determine masses and widths of the resonances with an accuracy of a linear collider. In addition to high-intensity(up to 2х107 interactions), beam of antiprotons would be unprecedented in the degree of monochromatic, the expected level of p/p down to 10-5, which will allow the study of strong interactions with high precision. PANDA detector is created using the most modern technology and provides a registration and identification of neutral and charged particles to nearly the full solid angle and energy range up to 15 GeV. A commissioning of PANDA and the first data taking is planned for 2018.

  46. Whole PANDA collaboration is grateful Organizers to give the possibility to present two Talks at the conference V. Mochalov, Hadron structure 2013

  47. BACKUP slides

  48. Точности измерения форм-фактора Ожидаемые точности измерений отношения R=|GE|/|GM| Мировые данные на форм-фактор |GM|

  49. V. Mochalov, Hadron structure 2013

  50. V. Mochalov, Hadron structure 2013

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