First Measurements of the Exclusive Decays of the Upsilon(5S) to B Meson Final States and Improved B^*_s Mass Measurement

Details First Measurements of the Exclusive Decays of the Upsilon(5S) to B Meson Final States and Improved B^*_s Mass Measurement First Measurements of the Exclusive Decays of the Upsilon(5S) to B Meson Final States and Improved B^*_s Mass Measurement

2006-01-30

arxiv.org/abs/hep-ex/0601044v3

Phys.Rev.Lett.96:152001,2006

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2006/, Submitted to PRL

Scientific paper

10.1103/PhysRevLett.96.152001

Using 420 pb^-1 of data collected on the Upsilon(5S) resonance with the CLEO III detector, we reconstruct B mesons in 25 exclusive decay channels to measure or set upper limits on the decay rate of Upsilon(5S) into B meson final states. We measure the inclusive B cross-section to be sigma(Y(5S)-->BB(X))=(0.176+-0.030+-0.016) nb and make the first measurements of the production rates of sigma(Y(5S)-->B*B*)=(0.131+-0.025+-0.014) nb and sigma(Y(5S)-->BB*)=(0.043+-0.016+-0.006) nb, respectively. We set 90% confidence level limits of sigma(Y(5S)-->B B-bar)<0.038 nb, sigma(Y(5S)-->B(*)B(*)(pi))<0.055 nb and sigma(Y(5S)-->BBpipi)<0.024 nb. We also extract the most precise value of the B_s* mass to date, M(B_s*)=(5411.7+-1.6+-0.6) MeV/c^2.

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