Photoproduction of {theta}{sup +}(1540,1/2{sup +}) reexamined with new theoretical information
Journal Article
·
· Physical Review. D, Particles Fields
- Yukawa Institute for Theoretical Physics (YITP), Kyoto University, Kyoto 606-8502 (Japan)
- Department of Physics, Inha University, Incheon 402-751 (Korea, Republic of)
We reinvestigate the photoproduction of the exotic pentaquark baryon {theta}{sup +}(1540,1/2{sup +}) from the {gamma}N{yields}K{theta}{sup +} reaction process within the effective Lagrangian approach, taking into account new theoretical information on the KN{theta} and K*N{theta} coupling strengths from the chiral-quark-soliton model ({chi}QSM). We also consider the crossing-symmetric hadronic form factor, satisfying the on-shell condition as well. Because of the sizable vector and tensor couplings for the vector kaon, g{sub K*N{theta}} and f{sub K*N{theta}}, which are almost the same with the vector coupling g{sub KN{theta}}{approx_equal}0.8 for the pseudoscalar kaon, the K*-exchange contribution plays a critical role in the photon-beam asymmetries.
- OSTI ID:
- 21259917
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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