Evidence for Bs* Bs* production at the Gamma(5S) resonance.
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We use data collected by the CLEO III detector at the Cornell Electron Storage Ring to measure the inclusive yields of D(s) mesons as B(Y(5S) --> D(s)X) = (44-7 +/- 4.2 +/- 9.9)% and B(Y(4S) --> D(s)X) = (18.1 +/- 0.5 +/- 2.8)%. From these measurements, we make a model dependent estimate of the ratio of B(s)*B(s)* to the total bb quark pair production of (16.0 +/- 2.6 +/- 5.8)% at the Y(5S) energy.
author list (cited authors)
Artuso, M., Boulahouache, C., Blusk, S., Butt, J., Dorjkhaidav, O., Li, J., ... CLEO Collaboration.