Revisiting semileptonic decays of Λb(c) supported by baryon spectroscopy

The semileptonic decays of Lambda(b) -> Lambda(c)(*)l(vl) and Lambda(c) -> Lambda(*)l(vl) are studied in the light-front quark model in this work. Instead of the quark-diquark approximation, we use the three-body wave functions obtained by baryon spectroscopy. The ground states (1/2(+)), the lambda-mode orbital excited states (1/2(-)), and the first radial excited states (1/2(+)) of Lambda((c))(*) are considered. The discussions are given for the form factors, partial (c) widths, branching fractions, leptonic forward-backward asymmetries, hadron polarizations, lepton polarizations, and the lepton flavor universalities. Our results are useful for the inputs of heavy baryon decays and understanding the baryon structures, and helpful for experimental measurements.

Automated summary

Semileptonic decays of Lambda(b) and Lambda(c) are studied in the light-front quark model, considering different states of Lambda((c))(*) and discussing form factors, branching fractions, and partial widths. The results provide insight into heavy baryon decays and baryon structures, and are valuable for experimental measurements.