Photoproduction of {theta}+

Journal Article · Tue Jul 11 04:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2220304· OSTI ID:20873350

Hosaka, Atsushi ^[1]; Nam, Seung-Il; Kim, Hyun-Chul ^[2]

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1. Research Center for Nuclear Physics, Osaka University, 567-0047, Mihogaoka, Osaka (Japan)
2. Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)

We study photoproduction of {theta}+ for several cases of JP of {theta}+. It is shown that in an effective lagrangian approach, the contact term of {gamma}KN{theta}+ plays a dominant role for charge-exchange processes, especially for the case of J = 3/2. Consequently, we have found a large asymmetry between the production rates from the proton and neutron targets; {sigma}({gamma}n {yields} K-{theta}+) >> {sigma}({gamma}p {yields} K-bar0{theta}+). The resulting total cross sections are of order few nb or less for the case of the proton target, which is compatible with the upper bound estimated by the recent results of the CLAS experiment. We also point out that the strong forward peak in angular distributions would make the observation of {theta}+ very sensitive to experimental setups.

• OSTI ID: 20873350
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 842; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ASYMMETRY
CHARGE EXCHANGE
CHARM PARTICLES
KAONS MINUS
KAONS NEUTRAL
LAGRANGIAN FUNCTION
MULTIPARTICLE SPECTROMETERS
NEUTRONS
PARTICLE IDENTIFICATION
PHOTON-NEUTRON INTERACTIONS
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
PROTONS
TOTAL CROSS SECTIONS