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Title
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Evidence for a narrow near-threshold structure in the mass spectrum in decays
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| Evidence is reported for a narrow structure near the J/ψϕ threshold in exclusive B+→J/ψϕK+ decays produced in p̅ 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/c2 and 11.7-5.0+8.3(stat)±3.7(syst) MeV/c2. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
,
2009
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.102.242002
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Volume/pages
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102
:24
(2009)
, p. 242002,1-242002,7
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ISI
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000267197900017
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Full text (Publisher's DOI)
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Full text (open access)
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