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Title

Evidence for a Narrow Near-Threshold Structure in the J/ψϕ Mass Spectrum in B+ -> J/ψϕK+ Decays

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2009, vol. 102, no. 24, p. 242002
Abstract Evidence is reported for a narrow structure near the J/ψϕ threshold in exclusive B+→J/ψϕK+ decays produced in pp collisions at s√=1.96  TeV. A signal of 14±5 events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of 2.7  fb−1, collected by the CDF II detector. The mass and natural width of the structure are measured to be 4143.0±2.9(stat)±1.2(syst)  MeV/c2 and 11.7+8.3−5.0(stat)±3.7(syst)  MeV/c2.
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CDF COLLABORATION. Evidence for a Narrow Near-Threshold Structure in the J/ψϕ Mass Spectrum in B+ -> J/ψϕK+ Decays. In: Physical Review Letters, 2009, vol. 102, n° 24, p. 242002. https://archive-ouverte.unige.ch/unige:38550

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Deposited on : 2014-07-08

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