Strange Beauty and Other Beasts from Upsilon(5S) at Belle

TL;DR

This paper reports on the exploration of the Upsilon(5S) resonance at Belle, highlighting new findings on Bs mesons and discussing future research prospects based on extensive data collection.

Contribution

It presents the first results from Belle's large dataset at Upsilon(5S), expanding the study of Bs mesons beyond the well-explored Upsilon(4S) resonance.

Findings

Initial results on Bs mesons from ~20% of data

Large dataset enabling detailed Bs studies

Discussion of future research possibilities

Abstract

The B-factories have successfully exploited the unique advantages of the Upsilon(4S) resonance to study many aspects of Bd and Bu mesons. The Upsilon(10860) (aka Upsilon(5S)) resonance, which is above mass threshold for the Bs and shares many of the same advantages, has been relatively unexplored. The Belle experiment has collected more than 120 fb-1 at the Upsilon(10860) and 7.9 fb-1 at higher energies, corresponding to more than 7 million Bs events. Recent results based on ~20% of these data are presented and prospects for future possiblities discussed.