Explaining Belle Data on $B\to K^{(\ast )}\nu \bar{\nu }$ Decays via Dark $Z$ Resonances

T. M. Aliev, A. Elpe, I. Turan +1

The Belle II Collaboration reported the first measurement on $\mathrm{Br}(B^{+}\to K^{+}\nu \bar{\nu })$, which lies 2.7$\sigma$ away from the Standard Model expectation. This result may be ma…