U-spin Implication for B_s Physics and New Physics

TL;DR

This paper explores how U-spin symmetry relates B_s decay processes to potential new physics effects, highlighting specific decay pairs where violations could indicate new physics beyond the Standard Model.

Contribution

It demonstrates that U-spin relations are mostly preserved in B->PP decays under certain assumptions, and discusses polarization effects in B->VV decays as a probe for new physics.

Findings

U-spin symmetry is expected to be violated in only one B->PP decay pair under specific assumptions.

U-spin relations can serve as subtle probes for CP-violating new physics contributions.

Polarization patterns in B->VV decays provide additional insights into potential new physics effects.

Abstract

With U-spin symmetry, b->s and b->d penguin decays could be a subtle probe of CP violating new physics contributions. We show that, for B->PP (P stands for a pseudoscalar meson), the U-spin relation is expected to be violated for only one decay pair by assuming that new physics affects only b->s transition processes. We also very shortly discuss the polarizations of two types of U-spin pairs for B->VV (V stands for a vector meson).