Spin--3/2 to spin--1/2 heavy baryons and pseudoscalar mesons transitions in QCD

TL;DR

This paper calculates the strong coupling constants and decay widths of light pseudoscalar mesons with heavy baryons of different spins using light cone QCD sum rules, providing results consistent with experimental data.

Contribution

It introduces a unified approach showing that transitions among certain heavy baryons are described by a single invariant function, simplifying the analysis.

Findings

Decay widths agree with experimental data

Transition constants are computed using light cone QCD sum rules

A single invariant function describes multiple transition classes

Abstract

The strong coupling constants of light pseudoscalar mesons with spin--3/2 and spin--1/2 heavy baryons are calculated in the framework of light cone QCD sum rules. It is shown that each class of transitions among members of the sextet spin--3/2 to sextet spin--1/2 baryons and that of the sextet spin--3/2 to spin--1/2 anti--triplet baryons is described by only one invariant function. We also estimate the widths of kinematically allowed transitions. Our results on decay widths are in good agreement with the existing experimental data, as well as predictions of other nonperturbative approaches.