Semileptonic B-Meson Decays at BaBar

TL;DR

This paper reports on measurements of semileptonic B-meson decays at BaBar, providing new estimates of the CKM matrix element |V_{cb}| using inclusive and exclusive decay channels based on large data samples.

Contribution

It presents novel measurements of |V_{cb}| from both inclusive and exclusive semileptonic B decays, utilizing extensive data samples from BaBar.

Findings

Two measurements of |V_{cb}| are reported.

Results are based on large data samples of 232 and 460 million B decays.

Semileptonic B decays are identified via lepton detection in tagged events.

Abstract

Presented are selected results of semileptonic B decays at BaBar. Two measurements of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ are reported. One using moments of the hadronic-mass spectrum in inclusive $\bar{B} \to X_{c} \ell^{-} \bar{\nu}$ decays, and the other, exclusive $\bar{B} \to D \ell^- \bar{\nu}_{\ell}$ decays. These results are based on data samples of 232 (inclusive $\bar{B} \to X_{c} \ell^{-} \bar{\nu}$) and 460 (exclusive $\var{B} \to D \ell^- \bar{\nu}_{\ell}$) million $\Upsilon(4S) \to B\bar{B}$ decays, recorded by the $BaBar$ detector at the PEP-II $e^+e^-$-storage rings. Semileptonic B decays are identified by requiring a lepton ($e$ or $\mu$) in events tagged with a full reconstruction of one of the B mesons in the $B\bar{B}$ pair.