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Photoproduction of K* meson off the proton target with the Regge contributions | | Seung-il Nam
; Byung-Geel Yu
; | | Date: |
15 Sep 2011 | | Abstract: | We investigate the K* Lambda(1116) photoproduction off the proton target,
using the tree-level Born approximation within the effective Lagrangian
approach. We take into account the kappa, K and K* exchanges in the t channel
in addition to the nucleon- and hyperon-pole contributions in the s and u
channels with the gauge-invariant form-factor scheme. The Regge trajectories of
the strange-mesons are also taken into account for the t-channel contributions
in such a way that the Feynman and Regge propagators are interpolated smoothly
for the relevant photon energy region. We provide numerical results for the
energy and angular dependences of the cross sections which result in a good
agreement with the presently available experimental data from CLAS
collaboration at Jefferson laboratory. It turns out that the Feynman-Regge
interpolation for the meson exchanges play a critical role in reproducing the
data simultaneously for the low and relatively high energy regions. We also
compute the momentum-transfer dependence of the differential cross section in
the t-channel and the photon-beam asymmetry as a guide for future experiments. | | Source: | arXiv, 1109.3236 | | Services: | Forum | Review | PDF | Favorites | |
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