HIDDEN CHARM SPECTROSCOPY FROM TEVATRON

The observation of a narrow structure near the J/ψ ϕ threshold in exclusive B+ → J/ψ ϕ K+ decays produced in $p\bar{p}$ collisions at $\sqrt{s} = 1.96\, {\rm TeV}$ is reported. A signal of 19 ± 6(stat) ± 3(syst) events, with statistical significance of 5.0 standard deviations, is seen in a data samp...

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Bibliographic Details
Published in:International journal of modern physics. Conference series 2011, Vol.2, p.41-45
Main Author: WICK, FELIX
Format: Article
Language:English
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Summary:The observation of a narrow structure near the J/ψ ϕ threshold in exclusive B+ → J/ψ ϕ K+ decays produced in $p\bar{p}$ collisions at $\sqrt{s} = 1.96\, {\rm TeV}$ is reported. A signal of 19 ± 6(stat) ± 3(syst) events, with statistical significance of 5.0 standard deviations, is seen in a data sample corresponding to an integrated luminosity of 6.0 fb-1, collected by the CDF II detector. The mass and natural width of the structure are determined to be $m = 4143.4^{+2.9}_{-3.0}(\mathrm{stat}) \pm 0.6(\mathrm{syst})\,\mathrm{MeV}/c^2$ and $\Gamma = 15.3^{+10.4}_{-6.1}(\mathrm{stat}) \pm 2.5(\mathrm{syst})\,\mathrm{MeV}/c^2$ , consistent with the previous measurements reported as evidence of the Y(4140).
ISSN:2010-1945
2010-1945
DOI:10.1142/S2010194511000845