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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22154
Title: Evidence for a Narrow Near-Threshold Structure in the J/psi phi Mass Spectrum in B+ -> J/psi phi K+ Decays
Authors: CDF Collaboration; Cabrera, Susana; Cuenca Almenar, Cristóbal; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Rodrigo, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío; Aaltonen, T.
Issue Date: 19-Jun-2009
Publisher: American Physical Society
Citation: Physical Review Letters 102 (24): 242002 (2009)
Abstract: Evidence is reported for a narrow structure near the J/psi phi threshold in exclusive B+ -> J/psi phi K+ decays produced in (p) over barp collisions at root 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/c(2) and 11.7(-5.0)(+8.3)(stat) +/- 3.7(stat) Mev/c(2).
Publisher version (URL): http://dx.doi.org/ 10.1103/PhysRevLett.102.242002
URI: http://hdl.handle.net/10261/22154
DOI: 10.1103/PhysRevLett.102.242002
ISSN: 0031-9007
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