Electromagnetic production of kaon near threshold

Abstract

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_{01}(1800) is found to play an important role in improving the model. In the case of double polarization observables Ox and Oz our result corroborates the finding of Sandorfi et al. Due to the large contributions of the K* and K1 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.

37 pages, 16 figures

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Cited by in corpus (13)

• Photoproduction of $K\Lambda$ on the proton
• Photo- and electroproduction of the K^0Lambda near threshold and effects of the K^0 electromagnetic form factor
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Evidence for the J^p=1/2^+ narrow state at 1650 MeV in the photoproduction of KLambda
• Coupling strength of the $N^{\ast }(1535)S_{11}$ to the $K^{+}\Lambda$ channel
• Coupled $K^{+}\Lambda$ and $K^0\Lambda$ photoproduction off the nucleon: Consequences from the recent CLAS and MAMI data and the $N(1680)P_{11}$ narrow state
• Extracting the pole and Breit-Wigner properties of nucleon and $\Delta$ resonances from the $\gamma N\to K\Sigma$ photoproduction
• Effect of the transfer reactions for 16O+10B elastic scattering
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Eta and kaon production in a chiral quark model
• Electroproduction of $\Lambda (1520)$ off the nucleon target with the nucleon resonances
• Evidence of the non-strange partner of pentaquark from the elementary $K^{+}\Lambda$ photoproduction
• Some Phenomenological Aspects of Kaon Photoproduction in the Extreme Kinematics