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Strange Pentaquarks

Strange Pentaquarks. Michał Praszałowicz M. Smoluchowski Inst. of Physics Jegellonian University , Kraków, Poland. Strange Pentaquarks. Michał Praszałowicz M. Smoluchowski Inst. of Physics Jegellonian University , Kraków, Poland. ~ 15 40. : Positive result : Negative result.

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Strange Pentaquarks

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  1. StrangePentaquarks Michał Praszałowicz M. Smoluchowski Inst. of Physics JegellonianUniversity, Kraków, Poland

  2. StrangePentaquarks Michał Praszałowicz M. Smoluchowski Inst. of Physics JegellonianUniversity, Kraków, Poland

  3. ~1540

  4. : Positive result : Negative result Time dependent experimental status of Q+ LEPS-d2 CLAS-d2 CLAS-d1 LEPS-d LEPS-C CLAS g11 SAPHIR DIANA CLAS-p BELLE DIANA BaBar ZEUS nBC Hermes SPHINX JINR SVD2 HyperCP SVD2 ALEPH, Z COSY-TOF COSY-TOF HERA-B BES J,Y CDF FOCUS WA89 2002200320042005 2006 2007 Michal Praszalowicz, Krakow

  5. Idealexperiment

  6. Formation cross section Breit-Wigner cross-section (GM + MP) K+ n 1/2 0 1/2 1/2 1/2

  7. : Positive result : Negative result Time dependent experimental status of Q+ LEPS-d2 CLAS-d2 CLAS-d1 LEPS-d LEPS-C CLAS g11 SAPHIR DIANA CLAS-p BELLE DIANA BaBar ZEUS nBC Hermes SPHINX JINR SVD2 HyperCP SVD2 ALEPH, Z COSY-TOF COSY-TOF HERA-B BES J,Y CDF FOCUS WA89 2002200320042005 2006 2007 Michal Praszalowicz, Krakow

  8. BELLE: secondarykaonbeam from D decaysinteracting withsiliconinvertexdetecor :  < 0.64 MeV R. Mizuk, Europhysics 2005, Lisbon. July 2005

  9. : Positive result : Negative result Time dependent experimental status of Q+ LEPS-d2 CLAS-d2 CLAS-d1 LEPS-d LEPS-C CLAS g11 SAPHIR DIANA CLAS-p BELLE DIANA BaBar ZEUS nBC Hermes SPHINX JINR SVD2 HyperCP SVD2 ALEPH, Z COSY-TOF COSY-TOF HERA-B BES J,Y CDF FOCUS WA89 2002200320042005 2006 2007 positiveresultfrom LEPS (Japan) remains

  10. T. Nakano (Osaka) Evidence of the Theta+ in the gamma d ---> K+ K- pn reaction.By LEPS Collaboration (T. Nakano et al.). Published in Phys.Rev.C79:025210,2009. e-Print: arXiv:0812.1035

  11. Michal Praszalowicz, Krakow

  12. MMgK-(GeV) T. Hotta, Acta Phys. Pol. B36, 2173

  13. : Positive result : Negative result Time dependent experimental status of Q+ X LEPS-d2 CLAS-d2 CLAS-d1 LEPS-d LEPS-C CLAS g11 SAPHIR DIANA CLAS-p BELLE DIANA BaBar ZEUS nBC Hermes SPHINX JINR SVD2 HyperCP SVD2 ALEPH, Z COSY-TOF COSY-TOF HERA-B BES J,Y CDF FOCUS WA89 2002200320042005 2006 2007 negativeresultsfrom CLAS high statistics d run contradictsprevious CLAS analysis and contradicts LEPS Michal Praszalowicz, Krakow

  14. Comparison of LEPS and CLAS Michal Praszalowicz, Krakow

  15. Comparison of LEPS and CLAS Michal Praszalowicz, Krakow

  16. : Positive result : Negative result Time dependent experimental status of Q+ X LEPS-d2 CLAS-d2 CLAS-d1 LEPS-d LEPS-C X CLAS g11 SAPHIR DIANA CLAS-p BELLE DIANA BaBar ZEUS nBC Hermes SPHINX JINR SVD2 HyperCP SVD2 ALEPH, Z COSY-TOF COSY-TOF HERA-B BES J,Y CDF FOCUS WA89 2002200320042005 2006 2007 negativeresultsfrom CLAS high statistics run contradicedpreviousexperiments Michal Praszalowicz, Krakow

  17. K- K0 K- K0 K0 K+ K*+ K* n n p p Q+ Q+ Q+ Q+ t-channel production of Q+ Michal Praszalowicz, Krakow

  18. K- K0 K- K0 K0 K+ K*+ K* p n p n Q+ Q+ Q+ Q+ t-channel production of Q+ ? ? known Michal Praszalowicz, Krakow

  19. CLAS estimate limits corresponding to the range of K* couplings Michal Praszalowicz, Krakow

  20. Mainassumption Theta+ exists with M ~ 1540 MeV and totalwidth ~ 1 MeV Whataboutothermembers of antidecuplet? Michal Praszalowicz, Krakow

  21. ~1540 1647? 1754? NA 49 NA 61 1861? Michal Praszalowicz, Krakow

  22. ~1540 Michal Praszalowicz, Krakow

  23. hn measurement in D(g,hn)p Kunznetsov et al. preprint (05) hp hn Is there a narrow resonance in nucleon excitation? GRAAL: hn measurement: quasi-free kinematics Michal Praszalowicz, Krakow

  24. eta photoproduction on nucleon Michal Praszalowicz, Krakow

  25. Hintsfrom PWA • (Arndt, Azimov, Polyakov, Workman) • STAR (Kabana....)

  26. Properties of N*(1685) Verygoodcandidate for nucleon-likemember of antidecuplet Decay to pion issuppressed Г > 1 MeV ηphotoprodutiondepends on: Br x μtransition2 and istherefore dependent on model calculation of μtransition Michal Praszalowicz, Krakow

  27. Decaywidths SU(3) relations = reducedmatrix element × SU(3) Clebsch

  28. Decays of N*(1685) in SU(3) limit Problem: in SU(3) limit decay to pion is 3 timeslargerthan to eta Michal Praszalowicz, Krakow

  29. Solution: mixing

  30. SU(3) flavorsymmetry Sometrivialfacts on SU(3) breaking Broken SU(3) Exact SU(3) allmassesequal GMO mass formulae

  31. SU(3) flavorsymmetry Sometrivialfacts on SU(3) breaking Broken SU(3) Exact SU(3) allmassesequal GMO mass formulae

  32. Mixing mixingwithground state octetα the same for N and Σ

  33. Decay of Theta+ Θ+→ K N

  34. Decay of Theta+ Θ+→ K N Normalsituation: largesmalllarge CANCELLATION ! Antidecuplet: smallsmalllarge

  35. ChiralQuarkSoliton Model In largeNcnon-relativistic limit:

  36. LowlyingJ+ baryonmultiplets

  37. Mixingwith „Roper ocet” mixingwith „Roperoctet” φ the same for N and Σ

  38. „Roperoctet” GMO mass formula workswell improvementpossible throughadditional mixing 1440**** 1600 ***, 1660*** 1690*** (spin=?,P=?)

  39. Decays of N10(1685)mixingwiththeRoperoctet

  40. Constrainingmixingangles

  41. Decays of N10(1685)branchingrats.alongtheorangeline

  42. Properties of Σ10 and Ξ10 dashed = GMO Michal Praszalowicz, Krakow

  43. Properties of Σ10 and Ξ10 NA 49 (1860) excluded Michal Praszalowicz, Krakow

  44. ~1540 1685 1647? 1754? ~1815 1861? ~1935 Michal Praszalowicz, Krakow

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