Proposal and theoretical formalism for studying baryon radiative decays from J/\psi \to B^*\bar B + \bar{B^*}B \to \gamma B\bar B

TL;DR

This paper proposes a theoretical framework for analyzing baryon radiative decays in J/psi decays, providing formulas for partial wave analysis to facilitate experimental studies at BESIII.

Contribution

It introduces a formalism and explicit formulas for studying baryon radiative decays in J/psi processes, aiding experimental analysis of excited baryons.

Findings

Estimated branching ratios for N*(1440), N*(1535), N*(1520) suggest feasibility at BESIII.

Provided covariant L-S scheme formulas for partial wave analysis.

Theoretical formalism enhances understanding of baryon internal structure.

Abstract

With accumulation of high statistics data at BESIII, one may study many new interesting channels. Among them, J/\psi \to B^*\bar B + \bar{B^*}B \to \gamma B\bar B processes may provide valuable information of the radiative decays of the excited baryons (N^*,\Lambda^*,\Sigma^*,\Xi^*), and may shed light on their internal quark-gluon structure. Our estimation for the branching ratios of the nucleon excitations N^*(1440), N^*(1535) and N^*(1520) from the reaction J/\psi \to N^*\bar p + \bar N^* p \to \gamma p\bar p, indicates that these processes can be studied at BESIII with 10^{10} J/\psi events. Explicit theoretical formulae for the partial wave analysis (PWA) of the J/\psi \to B^*\bar B +\bar B^* B with B^*\to B \gamma and \bar B^*\to \bar B\gamma within covariant L-S Scheme are provided.