Evidence for a Narrow Near-Threshold Structure in the J/ψϕ Mass Spectrum in B+→J/ψϕK+ Decays
| Contribuinte(s) |
University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Helsinki Institute of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics |
|---|---|
| Data(s) |
2009
|
| Resumo |
Evidence is reported for a narrow structure near the $J/\psi\phi$ threshold in exclusive $B^+\to J/\psi\phi K^+$ decays produced in $\bar{p} p $ collisions at $\sqrt{s}=1.96 \TeV$. A signal of $14\pm5$ events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of $2.7 \ifb$, collected by the CDF II detector. The mass and natural width of the structure are measured to be $4143.0\pm2.9(\mathrm{stat})\pm1.2(\mathrm{syst}) \MeVcc$ and $11.7^{+8.3}_{-5.0}(\mathrm{stat})\pm3.7(\mathrm{syst}) \MeVcc$. |
| Formato |
7 |
| Identificador |
http://hdl.handle.net/10138/24407 0031-9007 |
| Idioma(s) |
eng |
| Publicador |
American Institute of Physics |
| Relação |
Physical Review Letters |
| Fonte |
Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF Collaboration 2009 , ' Evidence for a Narrow Near-Threshold Structure in the J/ψϕ Mass Spectrum in B+→J/ψϕK+ Decays ' Physical Review Letters , vol 102 , no. 24 , pp. 242002 . , 10.1103/PhysRevLett.102.242002 |
| Palavras-Chave | #114 Physical sciences #hep-ex |
| Tipo |
A1 Refereed journal article info:eu-repo/semantics/article |
