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quarks

quarks. 5. at ISMD 200. Michal Praszalowicz Jagellonian University Krakow, Poland. Exotic theory. Exotic theory. [qqqq] 6  q. Y.  +  KN. 2.  10. I 3. Naive quark model expectations. Typical mass would be 5  310 + 150 = 1700 MeV Large width expected: fall apart mode

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quarks

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  1. quarks 5 at ISMD200 Michal Praszalowicz Jagellonian University Krakow, Poland Michal Praszalowicz, Krakow

  2. Exotic theory Michal Praszalowicz, Krakow

  3. Exotic theory [qqqq] 6q Y +  KN 2 10 I3 Michal Praszalowicz, Krakow

  4. Naive quark model expectations Typical mass would be 5  310 + 150 = 1700 MeV Large width expected: fall apart mode Typical splittings 150 MeV for one strange quark: in octet: (2s) - N = 380 in decuplet: (3s) -  = 440 in antidecuplet: (2s) - (s) = 150 Spin 1/2 ... Parity (-) Degenerate exotic octet Michal Praszalowicz, Krakow

  5. Evidence for exotics Particle Data Group 1986 Michal Praszalowicz, Krakow

  6. JLab-d DIANA ELSA ITEP SVD/IHEP JLab-p HERMES ZEUS COSY-TOF CERN/NA49 H1 pp  S+Q+. From January 2003 (from T. Nakano) Spring 8 a lot of evidence Nomad Michal Praszalowicz, Krakow

  7. Michal Praszalowicz, Krakow

  8. Evidence for exotics None of these experiments was designed to look for exotics 2004 LEPS and CLAS high statistics runs gave mixed results: LEPS +CLAS --  a few comments later Michal Praszalowicz, Krakow

  9. Conclusions • Still a convincing experiment is needed. Perhaps KN... Michal Praszalowicz, Krakow

  10. Mass in different experiments Final state: K+ + n K0 + p K0 + p ? A few % difference from 0, but ~20% difference from KN threshold Michal Praszalowicz, Krakow

  11. Naive quark model expectations Typical mass would be 5  310 + 150 = 1700 MeV Large width expected: fall apart mode Typical splittings 150 MeV for one strange quark: in octet: (2s) - N = 380 in decuplet: (3s) -  = 440 in antidecuplet: (2s) - (s) = 150 Spin 1/2 ... Parity (-) Degenerate exotic octet Michal Praszalowicz, Krakow

  12. Naive quark model expectations 1540 Typical mass would be 5  310 + 150 = 1700 MeV Large width expected: fall apart mode Typical splittings 150 MeV for one strange quark: in octet: (2s) - N = 380 in decuplet: (3s) -  = 440 in antidecuplet: (2s) - (s) = 150 Spin 1/2 ... ? Parity (+) ? Degenerate exotic octet ?  < 2 MeV  320! Michal Praszalowicz, Krakow

  13. Soliton Models Biedenharn, Dothan (1984): 10-8 ~ 600 MeV from Skyrme model MP (1987): M= 1535 MeV from Skyrme model in model independent approach, second order Diakonov, Petrov, Polyakov (1997): QM- model independent approach, 1/Nc corrections  M= 1530 MeV small width < 15 MeV ! In soliton models quark-antiquark excitation is added as a chiral excitation, therefore the masses are predicted to be small in comparison with the naive QM: 5  310 + 150 = 1700 Michal Praszalowicz, Krakow

  14. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models Michal Praszalowicz, Krakow

  15. New CLAS results Dave Tedeschi (USC), An overview of pentaquarks, Jlab users meeting 2005 Michal Praszalowicz, Krakow

  16. E = 1.6 - 2.6 GeV New g11 CLAS data E = 1.6 - 3.8 GeV R. De Vita, APS 2005; D. Tedeschi, Jlab 2005 Michal Praszalowicz, Krakow

  17. E = 1.6 - 2.6 GeV New g11 CLAS data E = 1.6 - 3.8 GeV H. Lipkin, M. Karliner hep-ph/0506084 Michal Praszalowicz, Krakow

  18. gd →K-pK+(n) New g10 CLAS data Dave Tedeschi, Lei Guo, Jlab users meeting 2005 Michal Praszalowicz, Krakow

  19. gd →K-pK+(n) New g10 CLAS data Rescattering required in order to "kick out" the proton from deuteron e.g. Kubarovsky, Stepanyan, hep-ex/0307088 Michal Praszalowicz, Krakow

  20. New LEPS result T. Nakano, QCD@Beijing 2005 T. Hotta, Acta Phys. Pol. B36, 2173

  21. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism Michal Praszalowicz, Krakow

  22. Spin and parity Unknown, in most models S = 1/2 parity: + - ChSM, correlated QM, QM with flavor dep.forces, 1  lattice parity: - - uncorrelated QM (but wider), lattice (if at all), SumRules Michal Praszalowicz, Krakow

  23. Spin and parity S. Sasaki, talk at Spring-8 Michal Praszalowicz, Krakow

  24. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory Michal Praszalowicz, Krakow

  25. Width • Most experiments give only upper limits: • CLAS ( p) < 23 MeV • DIANA (K+ Xe) < 9 MeV • However, some other experiments quote errors: • ZEUS (DIS) 6.1  1.6  MeV • COSY (p p) 18  4 MeV • HERMES (e p) 17  9  3 MeV • DUBNA (bubbl.ch.) 16  4 MeV • Phase shifts: < 2 MeV S.Nussinov, hep-ph/0307357; R.Arndt, I.Strakovsky, R.Workman, nucl-th/0308012 Michal Praszalowicz, Krakow

  26. Width in the soliton model D.Diakonov, V.Petrov, M.Polyakov, Z.Phys A359 (97) SU(3) relations   Decuplet decay: Antidecuplet decay: MP, PLB 583 (04) 96; A.Blotz, MP, K.Goeke PLB 354 (1995) 415 In NRQM limit: Michal Praszalowicz, Krakow

  27. Width in the soliton model D.Diakonov, V.Petrov, M.Polyakov, Z.Phys A359 (97) SU(3) relations   < 15 MeV Decuplet decay: Antidecuplet decay: In reality: However, G10 is still small Michal Praszalowicz, Krakow

  28. Why width is so small? D.Diakonov, V.Petrov hep-ph/0505201 Michal Praszalowicz, Krakow

  29. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand Michal Praszalowicz, Krakow

  30. Further exotics NA49 Michal Praszalowicz, Krakow

  31. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand • Confirmation of (1860) is badly needed Michal Praszalowicz, Krakow

  32. Further exotics Are these staes known PDG resonances or are there new narrow states still to be discovered? PWA-Arndt et al., nucl-th/0312126; GRAAL-V.Kuznetsov, hep-ex/040932 STAR-S.Kabana, hep-ex/040632 Michal Praszalowicz, Krakow

  33. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand • Confirmation of (1860) is badly needed • New nucleon-like and sigma-like resonances ? Michal Praszalowicz, Krakow

  34. Beyond antidecuplet mixing due to the SU(3) symmetry breaking Michal Praszalowicz, Krakow

  35. Effects of mixing SU(3) relations Michal Praszalowicz, Krakow

  36. Effects of mixing SU(3) relations Since G10 is small even moderate admixtures of other representations will violate SU(3) relations J.Ellis, M.Karliner, MP, JHEP 0405:002,2004 MP, Acta Phys. Pol. B35 (2004) 1625 S.Pakvasa, M.Suzuki, PRD70:036003 (2004) D.Diakonov, V.Petrov, PRD69:094011 (2004) R.Arndt et al. PRC69:035208 (2004) V.Guzey, M.Polyakov, Ann.Phys. 13 (3004) 673; hep-ph/0501010 Michal Praszalowicz, Krakow

  37. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand • Confirmation of (1860) is badly needed • New nucleon-like and sigma-like resonances ? • N*, S* masses and widths will suffer from mixing • SU(3) relations for widths will not hold ! Michal Praszalowicz, Krakow

  38. Further exotics Q++ Some indications for Q++ in data exist In quark models antidecuplet of spin 1/2 and 3/2 are nearly degenerate in mass Michal Praszalowicz, Krakow

  39. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand • Confirmation of (1860) is badly needed • New nucleon-like and sigma-like resonances ? • N*, S* masses and widths will suffer from mixing • SU(3) relations for widths will not hold ! • Further exotics: ++ or antidecuplet of spin 3/2 ... Michal Praszalowicz, Krakow

  40. Conclusions • Still a convincing experiment is needed. Perhaps KN... • Mass small, natural in chiral soliton models • More experiments  production mechanism • Spin of + is most probably 1/2 • Measure parity  important impact on theory • Width is extremly small, hard to understand • Confirmation of (1860) is badly needed • New nucleon-like and sigma-like resonances ? • N*, S* masses and widths will suffer from mixing • SU(3) relations for widths will not hold ! • Further exotics: ++ or antidecuplet of spin 3/2 ... Michal Praszalowicz, Krakow

  41. Michal Praszalowicz, Krakow

  42. Is Nature similing or laughing at us?

  43. Is Nature similing or laughing at us?

  44. Effects of mixing in soliton model modification factor residual freedom in soliton model  Michal Praszalowicz, Krakow

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