Bound on V+A admixture in the b -> c current from inclusive vs. exclusive semileptonic decays of B mesons

Details Bound on V+A admixture in the b -> c current from inclusive vs. exclusive semileptonic decays of B mesons Bound on V+A admixture in the b -> c current from inclusive vs. exclusive semileptonic decays of B mesons

1997-04-09

arxiv.org/abs/hep-ph/9704278v1

Mod.Phys.Lett.A12:1823-1827,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, LaTeX

Scientific paper

10.1142/S0217732397001850

An admixture of a right-handed $b \to c$ current in the semileptonic weak decays of the $B$ mesons would give a significantly different contribution to the inclusive rate of the decays $B \to l \nu X_c$ as compared to the exclusive decay $B \to D^* l \nu$ at zero recoil. Thus a difference in the values of $|V_{cb}|$ extracted from the data on these two types of decay would measure such admixture. The present marginal mismatch in determination of $|V_{cb}|$ by the two methods can be interpreted as corresponding to $g_R/g_L \approx 0.14 \pm 0.18$.

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