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2011

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

Faller, Sven, Mannel, Thomas, Turczyk, Sascha

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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.

Limits on New Physics from exclusive $B \to D^{(*)}\ell \bar\nu$ Decays · Around

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