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High Energy Physics - Phenomenology

arXiv:hep-ph/0508210 (hep-ph)
[Submitted on 19 Aug 2005 (v1), last revised 4 Jul 2006 (this version, v2)]

Title:Pentaquark Theta^+ production via gamma N ->K^*bar Theta^+(3/2^(+-))

Authors:Seung-Il Nam, Atsushi Hosaka, Hyun-Chul Kim
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Abstract: We study the photoproduction of the exotic pentaquark Theta^+ baryon with the vector kaon, assuming that the quantum numbers of the Theta^+ to be J^P=3/2^(+-) and J^P=1/2^+. Scalar meson kappa(800)-exchange is also taken into account. In contrast with the gamma N -> Kbar Theta^+(3/2^(+-)) process, the large suppression from the proton target is not observed in the total cross sections. We also suggest a method to determine which meson exchange is the most dominant by analyzing the polarizations of incident photon and outgoing K^*. We find that kappa-exchange turns out to be prominent when the polarizations of the photon and K^* are aligned to be parallel, whereas K-exchange does when they are perpendicular to each other.
Comments: 12 pages, 21 figures. Accepted for publication in Physical Review C
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: PNU-NTG-07/2005
Cite as: arXiv:hep-ph/0508210
  (or arXiv:hep-ph/0508210v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0508210
Journal reference: Phys.Rev.C74:025204,2006
Related DOI: https://doi.org/10.1103/PhysRevC.74.025204

Submission history

From: Seung-Il Nam [view email]
[v1] Fri, 19 Aug 2005 11:54:40 UTC (41 KB)
[v2] Tue, 4 Jul 2006 23:53:01 UTC (45 KB)
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