Lambda(1405) photoprodcution with p-wave contributions

TL;DR

This study investigates Lambda(1405) photoproduction including p-wave effects using a chiral unitary model, revealing significant p-wave contributions but still facing challenges in fully matching experimental data.

Contribution

It introduces p-wave resonance contributions from Sigma(1385) into the chiral unitary model for Lambda(1405) photoproduction, enhancing the understanding of the process.

Findings

P-wave contributions significantly affect the pi-Sigma spectrum.

The model reproduces some experimental features but not all.

Inclusion of p-wave effects is crucial for accurate modeling.

Abstract

In this report, we present our recent studies on the Lambda(1405,1/2-)=Lambda* photoproduction via the gamma p -> K+ pi Sigma scattering process, employing a coupled-channel formalism, i.e., the chiral unitary model, which respects chiral dynamics in terms of the Weinberg-Tomozawa meson baryon interaction. In addition to the dynamically generated s-wave resonance, Lambda*, we include the p-wave resonance contribution from Sigma(1385,3/2+). We observe that the p-wave contribution provides considerable effects on the pi-Sigma invariant-mass spectrum. It also turns out that, within the present level of calculations, we can reproduce hardly the recent Lambda* photoproduction experiment by LEPS collaboration at SPring-8.