Optimised observables and new physics prospects in the penguin-mediated decays $B_{d(s)}\to K^{(\ast )0}\varphi$

Aritra Biswas, Sébastien Descotes-Genon, Joaquim Matias +1

We study penguin-mediated ${\bar{B}}_{d(s)}\to {\bar{K}}^{\ast 0}(K^{\ast 0})\varphi$ transitions, proposing a new optimised observable $L_{K^{\ast }\varphi }$ from the ratio of the corresponding branching ratios…