Updates on inclusive charmed and bottomed meson decays from the lattice

TL;DR

This paper reports on lattice QCD calculations of inclusive semileptonic decay rates of the $D_s$ meson, demonstrating the viability of such computations and discussing the methodology, challenges, and future prospects.

Contribution

It presents the first lattice QCD calculation of the inclusive semileptonic decay of the $D_s$ meson covering the full kinematic range, with insights into systematic error estimation.

Findings

Decay rates for $D_s ightarrow X_s\,\ell\nu_\ell$ computed on the lattice.

Simulation used M"obius domain-wall charm and strange quarks at physical masses.

Discussion of systematic errors and future directions in lattice inclusive decay studies.

Abstract

With the development of lattice QCD in recent years, a determination of decay rates for inclusive semileptonic decays from lattice correlators now seems viable. We report on the calculation of the inclusive semileptonic decay of the $D_s$ meson on the lattice. We simulate the $D_s \rightarrow X_s\ell\nu_\ell$ process with M\"obius domain-wall charm and strange quarks, whose masses were approximately tuned to the physical values. We cover the whole kinematical region. We present a general overview on how the inclusive decays are treated on the lattice and discuss ongoing challenges, such as the estimation of systematic errors and future prospects of the project.