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Evidence for the Exclusive Decay Bc± -> J/ψπ± and Measurement of the Mass of the Bc± Meson

ContributorsCDF Collaboration
Published inPhysical review letters, vol. 96, no. 08, 082002
Publication date2006
Abstract

We report the first evidence for a fully reconstructed decay mode of the B±c meson in the channel B±c→J/ψπ±, with J/ψ→μ+μ−. The analysis is based on an integrated luminosity of 360  pb−1 in pp collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6±4.6 signal events with a background of 7.1±0.9 events, and a fit to the J/ψπ± mass spectrum yields a B±c mass of 6285.7±5.3(stat)±1.2(syst)  MeV/c2. The probability of a peak of this magnitude occurring by random fluctuation in the search region is estimated as 0.012%.

Citation (ISO format)
CDF Collaboration. Evidence for the Exclusive Decay <em>B<sub>c</sub><sup>±</sup></em> -&gt; <em>J/ψπ<sup>±</sup></em> and Measurement of the Mass of the <em>B<sub>c</sub><sup>±</sup></em> Meson. In: Physical review letters, 2006, vol. 96, n° 08, p. 082002. doi: 10.1103/PhysRevLett.96.082002
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ISSN of the journal0031-9007
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