Electromagnetic production of kaons near threshold

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.025209· OSTI ID:21419465

Mart, T ^[1]

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1. Departemen Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)

Kaon photo- and electroproduction off a proton near the production threshold are investigated by utilizing an isobar model. The background amplitude of the model is constructed from Feynman diagrams, whereas the resonance term is calculated by using the multipole formalism. It is found that both pseudoscalar and pseudovector models can nicely describe the available photoproduction data up to W=50 MeV above the threshold. The {Lambda} resonance S{sub 01}(1800) is found to play an important role in improving the model. In the case of double polarization observables O{sub x}{sup '} and O{sub z}{sup '} our result corroborates the finding of Sandorfi et al. (arXiv:0912.3505 [nucl-th]). Due to the large contributions of the K{sup *} and K{sub 1} vector mesons, extending the model to the case of electroproduction is almost impossible unless either special form factors that strongly suppress their contributions are introduced or all hadronic coupling constants are refitted to both photo- and electroproduction databases, simultaneously. It is also concluded that investigation of the kaon electromagnetic form factor is not recommended near the threshold region.

• OSTI ID: 21419465
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.025209; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
COUPLING CONSTANTS
ELECTROMAGNETIC FORM FACTORS
ELECTROPRODUCTION
FEYNMAN DIAGRAM
ISOBAR MODEL
KAONS MINUS
MEV RANGE 10-100
PHOTOPRODUCTION
POLARIZATION
PROTONS
RESONANCE
SIMULATION
VECTOR MESONS
BARYONS
BASIC INTERACTIONS
BOSONS
DIAGRAMS
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
HADRONS
INFORMATION
INTERACTIONS
KAONS
MATHEMATICAL MODELS
MESONS
MEV RANGE
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES