Probing CP violation in exclusive $b \to s \nu \bar \nu$ transitions

TL;DR

This paper introduces a time-dependent analysis of rare $B$ decays mediated by $b o s u ar u$ transitions, proposing new observables sensitive to CP violation and assessing their potential to detect new physics effects.

Contribution

It develops novel time-dependent observables for $b o s u ar u$ decays that are sensitive to CP-odd phases, enhancing the ability to probe CP violation and new physics.

Findings

Predictions for CP-sensitive observables in the SM.

Analysis of sensitivity to new CP-violating contributions.

Evaluation of experimental prospects at future $B$-physics experiments.

Abstract

We consider the time-dependent analysis of rare $B_d$ and $B_s$ decays mediated by $b\to s \nu \bar \nu$ transitions. The inclusion of time evolution allows us to construct novel observables with specific sensitivity to CP-odd phases in these processes. The sensitivity to CP violation of corresponding time-integrated measurements in presence of flavor-tagging is also explored. We provide precise predictions for these observables in the SM and explore their sensitivity to new CP-violating NP contributions at present and planned future $B$-physics experiments. As such, these observables provide unique probes of CP violation in $b \to s \nu \bar \nu$ transitions.