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It's all right(-handed neutrinos): a new $W'$ model for the $R_{D^{(*)}}$ anomaly by Asadi, Pouya; Buckley, Matthew R.; Shih, David is a scholarly article available to read on EtoBox.

What is It's all right(-handed neutrinos): a new $W'$ model for the $R_{D^{(*)}}$ anomaly about?

The measured $B$-meson semi-leptonic branching ratios $R_{D}$ and $R_{D^*}$ have long-standing deviations between theory and experiment. We introduce a model which explains both anomalies through a single interaction by introducing a right-handed neutrino as the missing energy particle. This interaction is mediated by a heavy charged vector boson ($W'$) which couples only to right-handed quarks and leptons of the Standard Model through the mixing of these particles with new vector-like fermions. Previous $W'$ models for the $R_{D^{(*)}}$ anomaly were strongly constrained from flavor changing neutral currents and direct collider searches for $Z'\to\tau\tau$ resonances. We show that relying on right-handed fermion mixing enables us to avoid these constraints, as well as other severe bounds from electroweak precision tests and neutrino mixing.

Author

Asadi, Pouya; Buckley, Matthew R.; Shih, David

Published

2018

Language

EN