First Evidence and Measurement of B_s^(*) barB_s^(*) Production at the Upsilon(5S)

TL;DR

This paper presents the first measurement of Bs(*) anti-Bs(*) production at the Upsilon(5S) resonance using CLEO III data, estimating the ratio of Bs production relative to total b anti-b pairs.

Contribution

It provides the first evidence and quantification of Bs(*) anti-Bs(*) production at the Upsilon(5S), expanding understanding of bottomonium decay channels.

Findings

Measured the inclusive yield of Ds mesons at Upsilon(5S)

Estimated the Bs(*) anti-Bs(*) production ratio as approximately 16%

Compared Upsilon(5S) data with Upsilon(4S) to infer Bs production

Abstract

We use data collected by the CLEO III detector at CESR on the Upsilon(5S) resonance to measure the inclusive yield of Ds mesons. Comparing with data taken on the Upsilon(4S), which decays into lighter B mesons, we make a model dependent estimate of the ratio of Bs(*)anti-Bs(*) to the total b anti-b quark pair production at the Upsilon(5S) energy of (16.0+/-2.6+/-5.8)%.