A lesson from $R_{\tau \tau }^{K^{(\ast )}}$ and $R_{\nu \nu }^{K^{(\ast )}}$ at Belle II

Arturo de Giorgi, Gioacchino Piazza

Within the assumption of Left-Handed (LH) New Physics (NP), we review the relations between $\mathcal{B}(B\to K^{(\ast )}{\tau }^{+}{\tau }^{-})$ and $\mathcal{B}(B\to K^{(\ast )}\nu \bar{\nu })$ for sev…