Measurement of the Ratio of Branching Fractions of the Υ(4S) to Charged and Neutral B Mesons

Details Measurement of the Ratio of Branching Fractions of the Υ(4S) to Charged and Neutral B Mesons Measurement of the Ratio of Branching Fractions of the Υ(4S) to Charged and Neutral B Mesons

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprs14003g&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Using 2.73 fb-1 of CLEO II data taken on the Υ(4S) and 1.43 fb-1 taken at a center of mass energy 60 MeV below the Υ(4S), we measure the ratio of production fractions times the ratio of semileptonic branching fractions, f_+-b_+\over f_00b0 through the decays barB arrow D^*l^- barν_l, reconstructed using a partial reconstruction method. Assuming that b_+\over b0 is equal to the lifetime ratio τ_+\overτ0 and using the world average value of τ_+\overτ_0, the ratio of branching fractions of the Υ(4S) to charged and neutral B mesons will be presented.

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