Evidence for a Narrow Near-Threshold Structure in the $$J/\psi\phi$$ Mass Spectrum in $$B^+\to J/\psi\phi K^+$$ Decays
Journal Article
·
OSTI ID:953249
Evidence is reported for a narrow structure near the J/{psi}{phi} threshold in exclusive B{sup +} {yields} J/{psi}{phi}K{sup +} decays produced in {bar p}p collisions at {radical}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{sup -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{sup 2} and 11.7{sub -5.0}{sup +8.3}(stat) {+-} 3.7(syst) MeV/c{sup 2}.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 953249
- Report Number(s):
- FERMILAB-PUB-09-064-E; arXiv eprint number arXiv:0903.2229; TRN: US0902685
- Country of Publication:
- United States
- Language:
- English
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