Y(5S) Results at Belle

TL;DR

This paper presents new experimental results from the Belle detector at KEKB on Y(5S) resonance, focusing on Bs0 meson decays and Y(5S) to Y(nS) pi+ pi- transitions, based on data collected at the resonance.

Contribution

First detailed analysis of Bs0 decay modes and Y(5S) to Y(nS) pi+ pi- transitions using Belle data at the Y(5S) resonance.

Findings

Observation of Bs0 -> Ds- pi+ and Bs0 -> Ds-/+ K+/- decays

Measurements of Y(5S) -> Y(nS) pi+ pi- transitions

Insights into Bs0 meson properties at Y(5S) energy

Abstract

The data sample recorded with the Belle detector at the KEKB B factory (Tsukuba, Japan) operating at the Y(5S) energy provides interesting and new results about the Bs0 mesons and the Y(5S) resonance. Recent analyses, based on data samples collected at the Y(5S) resonance (23.6 /fb) or near it (7.9 /fb), are presented with a special focus on the final results on the Bs0 ->Ds- pi+ and Bs0 -> Ds-/+ K+/- decays, and on the intriguing Y(5S) -> Y(nS) pi+ pi- measurements.