Radiative transitions of heavy quarkonium states

TL;DR

This paper investigates radiative decays of heavy quarkonium states using an effective Lagrangian approach, predicting unmeasured decay rates and exploring their relevance to understanding the structure of X(3872).

Contribution

It introduces a spin symmetry-based effective Lagrangian method to analyze heavy quarkonium radiative decays and predicts new decay rates.

Findings

Predicted unmeasured radiative decay rates for heavy quarkonium states.

Provided insights into the structure of X(3872) through decay mode analysis.

Validated the approach with existing experimental data.

Abstract

We study radiative decays of heavy $Q{\bar Q}$ states, both for $Q=c$ and $Q=b$, using an effective Lagrangian approach which exploits spin symmetry for such states. We use existing data on radiative quarkonium transitions to predict some unmeasured decay rates. We also discuss how these modes can be useful to understand the structure of X(3872).