Precision determination of the CKM element Vcb

Abstract

We extract the magnitude of the CKM matrix element Vcb and the most relevant parameters of the Heavy Quark Expansion from data of inclusive semileptonic B decays. Our calculation includes the recently computed O(alphas Lambda^2/mb^2) corrections and a careful estimate of the residual theoretical uncertainty. Using a recent determination of the charm quark mass, we obtain |Vcb| = (42.21+-0.78)x10-3 and mb_kin(1GeV)=(4.553+-0.020)GeV.

5 pages, v2: minor changes, matches journal version

References in corpus (7)

• Two-Loop Electroweak Corrections for the K -> pi nu anti-nu Decays
• Mass effects in muon and semileptonic b -> c decays
• Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics?
• Higher Order Power Corrections in Inclusive B Decays
• The bottom-quark mass from non-relativistic sum rules at NNNLO
• Renormalization Group Improved Bottom Mass from Upsilon Sum Rules at NNLL Order
• Improved Estimates for the Parameters of the Heavy Quark Expansion

Cited by in corpus (12)

• Updated NNLO QCD predictions for the weak radiative B-meson decays
• $R(D^{\ast })$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors
• Extraction of $|V_{cb}|$ from $B\to D^{(\ast )}\ell {\nu }_{\ell }$ and the Standard Model predictions of $R(D^{(\ast )})$
• Three loop calculations and inclusive $V_{cb}$
• Inclusive semi-leptonic decays from lattice QCD
• Tension in the inclusive versus exclusive determinations of $|V_{cb}|$: a possible role of new physics
• The Heavy Quark Expansion for Inclusive Semileptonic Charm Decays Revisited
• Semileptonic and leptonic $B$ decays, circa 2016
• Quark-hadron duality at work: lifetimes of bottom baryons
• Determination of $|V_{cb}|$ using N${}^3$LO perturbative corrections to $\Gamma (B\to X_c\ell \nu )$ and 1S masses
• Inclusive semileptonic B decays and |Vcb|
• Theory Motivation: What measurements are needed?