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Measurement of the muonic branching fractions of the narrow upsilon resonances

dc.contributor.authorBesson, David Zeke
dc.date.accessioned2007-04-13
dc.date.available2007-04-13
dc.date.issued2005-01
dc.identifier.citationAdams, GS, Chasse, M, et al. Measurement of the muonic branching fractions of the narrow upsilon resonances. PHYSICAL REVIEW LETTERS. January 2005. 94(1)
dc.identifier.urihttp://hdl.handle.net/1808/1394
dc.description.abstractThe decay branching fractions of the three narrow Y resonances to mu(+)mu(-) have been measured by analyzing about 4.3 fb(-1) e(+)e(-) data collected with the CLEO III detector. The branching fraction B(Y(1S)-->mu(+)mu(-))=(2.49+/-0.02+/-0.07)% is consistent with the current world average, but B(Y(2S)-->mu(+)mu(-))=(2.03+/-0.03+/-0.08)% and B(Y(3S)-->mu(+)mu(-))=(2.39+/-0.07+/-0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Y(2S) and Y(3S) resonances and lower other branching fractions that rely on these decays in their determination.
dc.language.isoen_US
dc.publisherAMERICAN PHYSICAL SOC
dc.relation.isversionofhttp://publish.aps.org/
dc.titleMeasurement of the muonic branching fractions of the narrow upsilon resonances
dc.typeArticle
dc.rights.accessrightsopenAccess


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