Observation of the Y (4140) structure in the J/ψϕ mass spectrum in B±→ J/ψϕK± decays
Author(s)
CDF Collaboration; Bauer, Gerry P; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Makhoul, Khaldoun; Paus, Christoph M. E.; ... Show more Show less
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© 2017 World Scientific Publishing Company. The observation of the Y (4140) structure in B± → J/ΨφK± decays produced in pp collisions at √ s = 1.96 TeV is reported with a statistical significance greater than 5 standard deviations. A fit to the J/Ψφ mass spectrum is performed assuming the presence of a Breit-Wigner resonance. The fit yields a signal of 19 ± 6 (stat) ± 3 (syst) resonance events, and resonance mass and width of 4143.4+2.9 -3.0 (stat)±0.6 (syst) MeV/c2 and 15.3+10.4 -6.1 (stat)±2.5 (syst) MeV/c2, respectively. The parameters of this resonancelike structure are consistent with values reported from an earlier CDF analysis.
Date issued
2017Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. Department of PhysicsJournal
Modern Physics Letters A [Particles and Fields; Gravitation; Cosmology and Nuclear Physics]
Publisher
World Scientific Pub Co Pte Lt