${\Lambda }_b\to {\Lambda }^{(\ast )}\nu \bar{\nu }$ decays and the recent Belle-II $B^{+}\to K^{+}\nu \bar{\nu }$ data

Diganta Das, Dargi Shameer, Ria Sain

The Belle-II experiment has recently reported the first measurement of $B^{+}\to K^{+}\nu \bar{\nu }$ decay which exceeds the Standard Model prediction by approximately 2.7$\sigma$. The deviation…