Magnetic interaction induced by the anomaly in kaon-photoproductions

TL;DR

This paper investigates how magnetic interactions, influenced by higher order diagrams from the Wess-Zumino-Witten term, affect kaon photoproduction, aligning theoretical models with observed photon asymmetries.

Contribution

It introduces a microscopic determination of K^* coupling constants through the inclusion of higher order magnetic interaction diagrams, improving theoretical accuracy.

Findings

Magnetic interactions significantly impact photon asymmetry in kaon photoproduction.

Higher order diagrams from the Wess-Zumino-Witten term are crucial for accurate modeling.

Microscopic K^* coupling constants align better with experimental data.

Abstract

We study the role of magnetic interaction in the photoproduction of the kaon and hyperon. We find that the inclusion of a higher order diagram induced by the Wess-Zumio-Witten term has a significant contribution to the magnetic amplitude, which is compatible to the observed photon asymmetry in the forward angle region. This enables us to use the K^* coupling constants which have been determined in a microscopic way rather than the phenomenological ones which differ largely from the microscopic ones.