An Extraction of Vcb from the Semi-Leptonic B->D* Decay

TL;DR

This paper extracts the CKM matrix element Vcb from lattice calculations of B->D* decay, providing a new estimate based on experimental data and theoretical computations.

Contribution

It introduces a lattice-based method to determine Vcb from B->D* decay matrix elements, combining theoretical calculations with experimental data.

Findings

|Vcb| = 0.037 with uncertainties

Consistent with previous measurements

Demonstrates lattice calculation viability

Abstract

We present an extraction of Vcb from a lattice calculation of the B->D* decay matrix elements. We obtain |Vcb| \sqrt{ \frac{ \tauB }{ 1.49 ps } } = 0.037^{+3 \ +5}_{-3 \ -5} from a single parameter fit to the new CLEO data. Email nmh@uk.ac.ed.ph.th