The semileptonic $B_s$ and $\Lambda_b$ widths

TL;DR

This paper estimates the semileptonic decay widths of $B_s$ and $\\Lambda_b$ hadrons using recent data, heavy quark expansion, and lattice QCD, highlighting significant uncertainties that need further experimental and theoretical refinement.

Contribution

It provides updated estimates of $B_s$ and $\Lambda_b$ semileptonic widths incorporating the latest data and lattice results, emphasizing the need for improved measurements and calculations.

Findings

Large uncertainties in the estimates.

Dependence on latest inclusive semileptonic data.

Potential for reduction with future measurements and lattice QCD.

Abstract

We present estimates of the semileptonic widths of the $B_s$ and $\Lambda_b$ hadrons. We employ the latest fit to the $B$ inclusive semileptonic data, the heavy quark expansion and lattice QCD results. Our results suffer from large uncertainties that could be reduced with dedicated measurements and new lattice QCD calculations.