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

Abstract

We consider the exclusive decays $B\to D^{(\ast )}\ell \bar{\nu }$ 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.

7 pages

References in corpus (3)

• The B -> D* l nu form factor at zero recoil from three-flavor lattice QCD: A model independent determination of |V_cb|
• Complete Michel Parameter Analysis of inclusive semileptonic b \to c transition
• Testing the left-handedness of the b \to c transition

Cited by in corpus (7)

• On the B to D* tau nu Sensitivity to New Physics
• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics?
• Tension in the inclusive versus exclusive determinations of $|V_{cb}|$: a possible role of new physics
• New ways to search for right-handed current in B -> rho ell nu decay
• Lepton Flavor Universality tests through angular observables of $\overline{B}\to D^{(\ast )}\ell \overline{\nu }$ decay modes
• B-Meson Decays into Final States with a tau Lepton