Bs0 Decays at Belle

TL;DR

This paper presents measurements of Bs meson decays at Belle, including CP-violation related modes, using a large data sample, providing new insights into Bs decay properties and CP-violation phenomena.

Contribution

First detailed measurements of various Bs decay modes at Belle, including CP eigenstates and decay width differences, enhancing understanding of Bs meson behavior.

Findings

Observation of Bs → Ds- h+ decays

Measurements of CP-eigenstate Bs decays

Extraction of ΔΓs(CP)/Γs from Bs → Ds(*) Ds(*) modes

Abstract

The large data sample recorded with the Belle detector at the {\Upsilon}(5S) energy provides a unique opportunity to study the poorly-known Bs meson. Several analyses, made with a data sample representing an integrated luminosity of 23.6 /fb, are presented. We report the study of the large-signal Bs {\to} Ds- h+ (h+ = {\pi}+, {\rho}+) decays. In addition, several results on Bs decays related to CP-violation studies are described. Beside the non-flavor specific Bs {\to} Ds K decay, the following CP-eigenstate decays are studied: Bs {\to} J/{\psi} {\eta}('), Bs {\to} J/{\psi} f0(980), the charmless Bs {\to} hh (h = {\pi}+, K+, KS0) and the three Bs {\to} Ds(*) Ds(*) modes from which {\Delta}{\Gamma}s(CP)/{\Gamma}s is extracted.