Radiative transition of negative to positive parity nucleon

TL;DR

This paper uses light cone QCD sum rules to analyze the radiative transition of the N*(1535) nucleon resonance, calculating form factors, decay width, and branching ratio, which align well with experimental data.

Contribution

It introduces a comprehensive calculation of the N*(1535) to N gamma transition form factors using the most general interpolating current and photon distribution amplitudes.

Findings

Calculated transition form factors match experimental data.

Estimated decay width and branching ratio are consistent with observations.

Provides detailed theoretical insight into the radiative transition process.

Abstract

We investigate the $N^{\ast}(1535)\rightarrow N\gamma$ transition in the framework of light cone QCD sum rules. In particular, using the most general form of the interpolating current for the nucleon as well as the distribution amplitudes of the photon, we calculate two transition form factors responsible for this channel and use them to evaluate the decay width and branching ratio of the transition under consideration. The result obtained for the branching fraction is in a good consistency with the experimental data.