LHC results on tree-level beauty decays

TL;DR

This paper reviews recent LHCb results on tree-level beauty decays, focusing on semileptonic baryon decays, tau decay ratios, CP asymmetries, and CKM angle measurements, which are crucial for testing the Standard Model and exploring new physics.

Contribution

It presents new experimental measurements of semileptonic $b$ baryon decays, tau decay ratios, CP observables, and CKM angle $oldsymbol{ extgamma}$, enhancing the understanding of quark flavor physics.

Findings

Measurement of $oldsymbol{ extcal{R}}(D^{oldsymbol{-}})$ using hadronic $ au$ decays

Observation of CP asymmetries in $B^- o D^{(oldsymbol{ extit{(*)}})}h^-$ decays

Updated combination of CKM angle $oldsymbol{ extgamma}$ results

Abstract

Tree-level $b$ decays play a critical role in characterising the quark flavour sector, and exposing possible effects of physics beyond the Standard Model. These proceedings cover recent results from the LHCb experiment on semileptonic $b$ baryon decays, $\mathcal{R}(D^{\ast-})$ using three-prong hadronic $\tau$ decays, $CP$ observables in $B^- \to D^{(\ast)}h^-$ decays, and an updated combination on the CKM angle $\gamma$.