Evidence for a Narrow Near-Threshold Structure in the J/ψϕ Mass Spectrum in B+→J/ψϕK+ Decays

Journal Article (Academic article)

Evidence is reported for a narrow structure near the J/ψϕ threshold in exclusive B+→J/ψϕK+ decays produced in p̅ p collisions at sqrt[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.

Full Text

Duke Authors

Cited Authors

  • Aaltonen, T; others,

Published Date

  • 2009

Published In

  • Phys. Rev. Lett.

Volume / Issue

  • 102 / 24

Start / End Page

  • 242002 -

Published By

PubMed ID

  • 19658999