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Journal of High Energy Physics

, 2017:61 | Cite as

R(D), |Vcb|, and the Heavy Quark Symmetry relations between form factors

  • Dante Bigi
  • Paolo Gambino
  • Stefan SchachtEmail author
Open Access
Regular Article - Theoretical Physics

Abstract

Stringent relations between the B(∗)D(∗) form factors exist in the heavy quark limit and the leading symmetry breaking corrections are known. We reconsider their uncertainty and role in the analysis of recent Belle data for BD(∗)ν with model-independent parametrizations and in the related prediction of R(D(∗)). We find |Vcb| = 41.5(1.3) 10−3 and |Vcb| = 40.6( − 1.3 + 1.2 ) 10−3 using input from Light Cone Sum Rules, and R(D) = 0.260(8).

Keywords

Heavy Quark Physics Quark Masses and SM Parameters 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2017

Authors and Affiliations

  1. 1.Dipartimento di FisicaUniversità di Torino & INFNTorinoItaly

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