Weak Decays of Heavy Baryons in Light-Front Approach

TL;DR

This paper analyzes semi-leptonic and nonleptonic weak decays of heavy baryons using the light-front approach, providing form factors and decay widths that align with experimental data and predicting observable branching fractions.

Contribution

It introduces a light-front approach to calculate form factors for heavy baryon decays, focusing on factorizable channels and examining SU(3) symmetry breaking effects.

Findings

Results agree with experimental data and other theories.

Decay branching fractions reach 10^{-3} to 10^{-2}.

Predictions are promising for future experiments at BESIII, LHCb, and BelleII.

Abstract

In this work, we perform a analysis of semi-leptonic and nonleptonic weak decays of heavy baryons: $\Lambda_{b},\Xi_{b},\Omega_{b}$ and $\Lambda_{c},\Xi_{c},\Omega_{c}$. For nonleptonic decay modes, we study only the factorizable channels induced by the external W-emission. The two spectator quarks in baryonic transitions are treated as a diquark and form factors are calculated in the light-front approach. Using the results for form factors, we also calculate some corresponding semi-leptonic and nonleptonic decay widths. We find that our results are comparable with the available experimental data and other theoretical predictions. Decay branching fractions for many channels are found to reach the level $10^{-3}\sim10^{-2}$, which are promising to be discovered in the future measurements at BESIII, LHCb and BelleII. The SU(3) symmetry in semi-leptonic decays is examined and sources of symmetry breaking are discussed.