The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators

Abstract

In a recent paper we performed a comprehensive study of the impact of new-physics operators with different Lorentz structures on $\BDstarellnu$ decays, $\ell =e^{-},{\mu }^{-},{\tau }^{-}$, involving the $b\to cl{\nu }_{\ell }$ transition. In this work we extend the previous calculation by including tensor operators. In the case of $\BDstartaunu $, we present the full three angle and $q^2$ angular distribution with tensor new physics operators with complex couplings. The impact of the tensor operators on various observables in the angular distribution, specially the azimuthal observables including the CP violating triple product asymmetries are discussed. It is shown that these azimuthal observables are very useful in discriminating different new physics operators. Finally we consider new physics leptoquark models with tensor interactions and show how the presence of additional scalar operators modify the predictions of the tensor operators.

20 pages, 22 figures, to appear in Phys. Rev. D. arXiv admin note: text overlap with arXiv:1302.7031; and overlap with arXiv:1309.0301 by other authors

References in corpus (7)

• On the B to D* tau nu Sensitivity to New Physics
• Implications of lepton flavor universality violations in B decays
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• $B_s$ Mixing and New Physics in hadronic $b\to s\bar{q}q$ transitions
• CP violation in $B\to D\tau {\nu }_{\tau }$ using multi-pion tau decays
• B decay anomalies in an effective theory

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• The semileptonic decay Lambda_b -> Lambda_c + tau(-) + antinu_tau in the covariant confined quark model
• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
• Probing New Physics with $q^2$ distributions in $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Probing new physics in ${\bar{B}}^0\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ using the longitudinal, transverse, and normal polarization components of the tau lepton