Evidence for a Narrow Near-Threshold Structure in the J/ psi phi Mass Spectrum in B+-->J/ psi phi K+ Decays
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Aaltonen-2009-Evidence for a Narro.pdf
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Author(s)
Xie, Si
Henderson, C.
Hahn, Kristian Allan
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Knuteson, Bruce O.
Choudalakis, Georgios
Paus, Christoph M. E.
Makhoul, Khaldoun
Bauer, Gerry P
Date Issued
June 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Evidence for a Narrow Near-Threshold Structure in the J/ psi phi Mass Spectrum in B+-->J/ psi phi K+ Decays.” Physical Review Letters 102.24 (2009): 242002. (C)2010 The American Physical Society.
Version
Final published version
Abstract
Evidence is reported for a narrow structure near the J/ψϕ threshold in exclusive B+→J/ψϕK+ decays produced in (p)over-bar p 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/c[superscript 2] and 11.7[subscript -5.0] [superscript +8.3](stat)±3.7(syst) MeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.242002
