Light-Cone Sum Rules for the Form Factors of the $N\gamma\Delta$ transition at Q^2=0

TL;DR

This paper applies light-cone QCD sum rules to calculate the $N o\Delta$ transition form factors at zero momentum transfer, providing theoretical insights into the radiative decay process.

Contribution

It develops sum rules for the $G_M(0)$ and $R_{EM}$ form factors at twist 4, advancing the theoretical understanding of the $N o\Delta$ transition.

Findings

Sum rules for $G_M(0)$ and $R_{EM}$ derived at twist 4.

Provides theoretical predictions for the radiative transition at $Q^2=0$.

Enhances understanding of nucleon to delta transition mechanisms.

Abstract

The radiative $\Delta \to \gamma N$ transition is examined at the real photon point $Q^2=0$ using the framework of light-cone QCD sum rules. In particular, we determine the sum rules for the transition form factors $G_M(0)$ and $R_{EM}$ up to twist 4.