Limits on New Physics from exclusive $B \to D^{(*)}\ell \barν$ Decays

Details Limits on New Physics from exclusive $B \to D^{(*)}\ell \barν$ Decays Limits on New Physics from exclusive $B \to D^{(*)}\ell \barν$ Decays

2011-05-18

arxiv.org/abs/1105.3679v1

Phys.Rev.D84:014022,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages

Scientific paper

10.1103/PhysRevD.84.014022

We consider the exclusive decays $B \to D^{(*)}\,\ell \bar\nu$ and study the effect of non $V-A$ structures on the observables. We extend the standard model hadronic current by additional right-handed vector as well as left- and right-handed scalar and tensor contributions and calculate the decay rates including the perturbative corrections up to order $\alpha_s$. Using the data of the exclusive semileptonic $b \to c $ decays and recent calculations of the form factors at the non-recoil point we discuss the constraints to the wrong helicity admixtures in the hadronic current.

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