Strong coupling constants of light pseudoscalar mesons with heavy baryons in QCD

TL;DR

This paper calculates the strong coupling constants between light pseudoscalar mesons and heavy baryons using light cone QCD sum rules, revealing a universal behavior across different baryon transition classes.

Contribution

It introduces a unified approach to compute coupling constants for various heavy baryon transitions within the light cone QCD sum rules framework.

Findings

Universal invariant function describes multiple transition classes.

Results compare favorably with existing literature.

Provides new quantitative estimates for coupling constants.

Abstract

We calculate the strong coupling constants of light pseudoscalar mesons with heavy baryons within the light cone QCD sum rules method. It is shown that sextet--sextet, sextet--antitriplet and antitriplet--antitriplet transitions are described by one universal invariant function for each class. A comparison of our results on the coupling constants with the predictions existing in literature is also presented.