Analysis of $\gamma^\ast \Lambda \to \Sigma^0$ transition in QCD

TL;DR

This paper investigates the electromagnetic transition form factors between Lambda and Sigma^0 baryons using light-cone QCD sum rules, providing insights into their Q^2 dependence and comparing with quark model predictions.

Contribution

It introduces a novel calculation of the $emale o emale$ transition form factors using light-cone QCD sum rules with general interpolating currents.

Findings

Q^2 dependence of form factors calculated

Results compared with covariant spectator quark model

Provides new theoretical insights into baryon transitions

Abstract

The $\gamma^\ast \Lambda \to \Sigma^0$ transition form factors are investigated within the light--cone QCD sum rules method. Using the most general form of the interpolating current of $\Sigma^0$ baryon and the distribution amplitudes of $\Lambda$ baryon we calculate the $Q^2$ dependence of the electromagnetic form factors. Our result are compared with the predictions of the covariant spectator quark model.