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

2017/07/31 by Dante Bigi, Paolo Gambino, Stefan Schacht · 8 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Light cone #Limit (mathematics) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #Symmetry (geometry) #Symmetry breaking #Top quark #hep-ph

paper · pdf · doi:10.1007/jhep11(2017)061

13 pages. Improved discussion of R(D*), P_tau prediction and various explanations added

openalex created_date 2017/08/08 · arxiv created 2017/10/22 · openalex publication_date 2017/11/01 · arxiv updated 2017/12/06 · openalex updated_date 2026/08/05

Abstract

A bstract 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 B → D (∗) ℓ ν with model-independent parametrizations and in the related prediction of R ( D (∗) ). We find | V cb | = 41.5(1.3) 10 −3 and | V cb | = 40.6( − 1.3 + 1.2 ) 10 −3 using input from Light Cone Sum Rules, and R ( D ∗ ) = 0.260(8).

Citations

• Review of Multibody Charm Analyses

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