Revisiting the new-physics interpretation of the b → cτν data

@article{Shi2019RevisitingTN,
  title={Revisiting the new-physics interpretation of the b → c$\tau$$\nu$ data},
  author={Rui-Xiang Shi and Li-Sheng Geng and Benjam{\'i}n Grinstein and Sebastian Jager and Jorge Martin Camalich},
  journal={Journal of High Energy Physics},
  year={2019}
}
Abstract We revisit the status of the new-physics interpretations of the anomalies in semileptonic B decays in light of the new data reported by Belle on the lepton-universality ratios R D(*) using the semileptonic tag and on the longitudinal polarization of the D * in B → D * τν, $$ {F}_L^{D\ast } $$ F L D ∗ . The preferred solutions involve new left-handed currents or tensor contributions. Interpretations with pure right-handed currents are disfavored by… 

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