Charged K* Photoproduction in a Regge model

TL;DR

This paper models the photoproduction of K* mesons using a Regge approach, successfully reproducing experimental cross-section trends and highlighting differences from traditional Feynman models through spin density matrix calculations.

Contribution

It introduces a Regge-based method for charged K* photoproduction that maintains gauge invariance and provides a more accurate description of experimental data compared to previous models.

Findings

Total cross section decreases as observed in CLAS data

Regge model differs significantly from Feynman models in spin observables

Model successfully reproduces experimental trends

Abstract

We investigate $\gamma p \to K^{*+} \Lambda$ reaction within a Regge approach. For the gauge invariance of the scattering amplitude, we reggeize the s-channel and contact term amplitudes as well as the $t$-channel amplitude. We obtain the decreasing behavior of the total cross section as the CLAS's preliminary data show. We also calculate spin density matrices, and find clear differences between our Regge model and the previous Feynman (isobar) model.