Observation of a Narrow Near-Threshold Structure in the $J/\psi \varphi$ Mass Spectrum in $B^{+}\to J/\psi \varphi K^{+}$ Decays

Abstract

Observation is reported for a structure near the $J/\psi \varphi$ threshold in $B^{+}\to J/\psi \varphi K^{+}$ decays produced in $\bar{p}p$ collisions at $\sqrt{s}=1.96 \TeV$ with a statistical significance of beyond 5 standard deviations.

arXiv comment4 pages, 6 figures, proceeding for the 35th International Conference of High Energy Physics - ICHEP2010