Hint of a new scalar interaction in LHCb data?

Alakabha Datta, Danny Marfatia, Lopamudra Mukherjee

We explain recent LHCb measurements of the lepton universality ratios, $R_{D^{(*)}}^{τ/\ell}\equiv \frac{\mathcal{B}(\bar B \to D^{(*)+} τ^- \barν_τ)} {\mathcal{B}(\bar B \to D^{(*…