$B\to D^\ast\ell\nu$ from LQCD: is there light at the end of the tunnel?

TL;DR

This paper reviews the current status and future prospects of lattice QCD calculations for B to D* semileptonic decays, which are crucial for understanding flavor anomalies.

Contribution

It provides a concise overview of recent lattice QCD results on B to D* form factors and discusses future expectations in this research area.

Findings

Recent LQCD calculations of B→D* form factors have not yet provided definitive answers.

The review highlights the progress and limitations of current lattice QCD studies.

Future improvements in LQCD are anticipated to clarify flavor anomaly questions.

Abstract

Lattice QCD (LQCD) calculations play a key role in the establishment of flavor anomalies. One of the most recent advancements in LQCD to this end has been the publication of several calculations of the $B\to D^\ast\ell\nu$ form factors, but despite all the anticipation, the LQCD results have been unable to give a final answer to the questions it was destined to answer. In this work I briefly review what is the current status of heavy-to-heavy and heavy-to-light semileptonic decays calculations in LQCD, and what we can expect for the near and not-so-near future.