Evidence for a Narrow Near-Threshold Structure in the J/ psi phi Mass Spectrum in B+-->J/ psi phi K+ Decays

Evidence for a Narrow Near-Threshold Structure in the J/ psi phi Mass Spectrum in B+-->J/ psi phi K+ Decays

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 integr...

Full description

Bibliographic Details
Main Authors: 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
Other Authors: Massachusetts Institute of Technology. Laboratory for Nuclear Science
Format: Article
Language:en_US
Published: American Physical Society 2010
Online Access:http://hdl.handle.net/1721.1/50756
https://orcid.org/0000-0002-6047-4211
Description
Summary: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].

Similar Items