A novel measurement of $B_s^0$ and $D_s^{-}$ lifetimes using semileptonic decays at LHCb

Abstract

I report new, world-leading LHCb results on heavy meson lifetimes. We use a novel approach that suppresses the shortcomings typically associated with reconstruction of semileptonic decays, allowing for precise measurements of lifetimes and other properties in collider experiments. We achieve a 15% and a $2\times$ improvement over current best determinations of the flavor-specific $B_s^0$ lifetime and $D_s^{-}$ lifetime, respectively.

arXiv comment12 pages, 6 figures. Talk presented at the APS Division of Particles and Fields Meeting (DPF 2017), July 31-August 4, 2017, Fermilab. C170731