Scalar kappa meson in K* photoproduction

Details Scalar kappa meson in K* photoproduction Scalar kappa meson in K* photoproduction

2006-05-10

arxiv.org/abs/hep-ph/0605105v1

Phys.Rev.C74:015208,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures, REVTeX

Scientific paper

10.1103/PhysRevC.74.015208

We propose that the scalar $\kappa(800)$ meson may play an important role in $K^*$ photoproduction. In the reactions of $\gamma p \to K^{*+} \Lambda$ and $\gamma p \to K^{*0} \Sigma^+$, we consider the production mechanisms including $t$-channel $K^*$, $K$, $\kappa$ exchanges, s-channel $N$, $\Delta$ diagrams, and $u$-channel $\Lambda$, $\Sigma$, $\Sigma^*$ diagrams within the tree level approximation, and find that the $\kappa$-meson exchange may contribute significantly to $K^*\Sigma$ photoproduction, while it is rather supplementary in $K^*\Lambda$ photoproduction. We demonstrate how the observables of $K^*$ photoproduction can be used to constrain the $\kappa$ meson properties. In particular, the parity asymmetry can separate the $\kappa$ meson contribution in $K^*$ photoproduction.

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