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Measurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs

dc.contributor.authorAmmar, Raymond G.
dc.contributor.authorBean, Alice
dc.contributor.authorBesson, David Zeke
dc.contributor.authorDavis, Robin E. P.
dc.contributor.authorKwak, Nowhan
dc.contributor.authorZhao, X.
dc.date.accessioned2007-04-09T23:36:48Z
dc.date.available2007-04-09T23:36:48Z
dc.date.issued2001-03
dc.identifier.citationAlexander, JP; Baker, R, et al. Measurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs. PHYSICAL REVIEW LETTERS. March 2001. 86(13) : 2737-2741
dc.identifier.urihttp://hdl.handle.net/1808/1314
dc.description.abstractWe analyze 9.7 X 10(6) B (B) over bar pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Y(4S) resonance. We measure the rates for B-0 --> J/psiK((*)0) and B+ --> J/psiK((*)+) decays and use the world-average B-meson lifetime ratio to extract the relative widths f(+-)/f(00) = Gamma (Y(4S)-->B+B-)/Gamma (Y(4S)-->B-0(B) over bar (0)) = 1.04 +/- 0.07(stat) +/- 0.04(syst). With the assumption that f(+-) + f(00) = 1, we obtain f(00) = 0.49 +/- 0.02(stat) +/- 0.01(syst) and f(+-) = 0.51 +/- 0.02(stat) +/- 0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Y(4S) resonance.
dc.language.isoen_US
dc.publisherAMERICAN PHYSICAL SOC
dc.relation.isversionofhttp://publish.aps.org/
dc.titleMeasurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs
dc.typeArticle
dc.rights.accessrightsopenAccess


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