By Manabu Moritsu
ISBN-10: 9811000107
ISBN-13: 9789811000102
ISBN-10: 9811000123
ISBN-13: 9789811000126
This theses experiences on an experimental look for an unique hadron, Θ+(1540) pentaquark, that's a real unique hadron with a five-quark procedure of uuddsbar. the result of this publication aid that the life of Θ+ was once strongly restricted.
The Θ+ pentaquark used to be looked for through the π- p → K- X response utilizing a beam momentum of 2.01 GeV/c on the J-PARC hadron experimental facility, benefiting from high-statistics and high-resolution in comparison with prior experiments, a few of which claimed the proof of Θ+. so as to become aware of an excellent missing-mass solution of two MeV, the beam spectrometer and superconducting kaon spectrometer have been constructed.
No transparent height used to be saw within the lacking mass spectrum of the π- p → K- X response, and the higher restrict of the creation pass part was once chanced on to be below 0.28 μb/sr on the ninety% self belief point in a mass area of 1500–1560 MeV/c2. This top restrict is an order of importance smaller than that of the former KEK scan. in comparison with a theoretical calculation utilizing the potent Lagrangian procedure, the decay width of Θ+ was once evaluated. the higher limits at the decay width have been expected to be 0.36 and 1.9 MeV for the Θ+ spin-parity of 1/2+ and 1/2-, respectively. those are rather small for a width of standard hadron resonances, and the lifestyles of Θ+ was once strongly restricted and is doubtful.
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Additional resources for Search for the Pentaquark Θ+ via the π−p → K−X Reaction at J-PARC
Example text
2, the isospin is 0 by definition. Nevertheless, this should be confirmed experimentally. If it was an isovector (I = 1), one might expect to observe its isospin partners, Θ 0 and Θ ++ . The Θ ++ was searched for in the pK + decay channel, but no evidence was observed in the SAPHIR [42], HERMES [60], ZEUS [61], and CLAS [88] experiments, even though each reported positive evidence for Θ + . No observation was also reported in the 18 1 Introduction to Pentaquark Search DELPHI [65] and JLab Hall A [89] experiments.
Ko, Phys. Rev. C 68, 045203 (2003) T. Hyodo, A. Hosaka, E. Oset, Phys. Lett. B 579, 290 (2004) Y. Oh, H. H. Lee, Phys. Rev. D 69, 014009 (2004) Y. Oh, H. H. Lee, Phys. Rev. M. Ko, W. Liu, arXiv:nucl-th/0410068 (Proceedings of PENTAQUARK04) P. Ko, J. Lee, T. -H. Park, Phys. Lett. B 611, 87 (2005) T. Hyodo, A. Hosaka, Phys. Rev. C 72, 055202 (2005) T. Hyodo, A. Hosaka, M. Oka, Prog. Theor. Phys. 128, 523 (2012) M. pdf T. ), Special Issue: Particle and Nuclear Physics at J-PARC, Prog. Theor. Exp. Phys.
Phys. Rev. C 77, 045203 (2008) V. , CLAS Collaboration. Phys. Rev. Lett. 97, 102001 (2006) Y. , Jefferson Lab Hall A Collaboration. Phys. Rev. C 75, 055208 (2007) C. , NA49 Collaboration. Phys. Rev. Lett. 92, 042003 (2004) A. , H1 Collaboration. Phys. Lett. I. , WA89 Collaboration. Phys. Rev. C 70, 022201(R) (2004) A. , HERMES Collaboration. Phys. Rev. S. , COMPASS Collaboration. Eur. Phys. J. C 41, 469 (2005) S. , ZEUS Collaboration. Phys. Lett. C. , FNAL E690 Collaboration. Phys. Rev. Lett. N.
Search for the Pentaquark Θ+ via the π−p → K−X Reaction at J-PARC by Manabu Moritsu
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