Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$

Details Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$ Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$

2009-12-12

arxiv.org/abs/0912.2383v3

Phys.Rev.Lett.104:112004,2010

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures, publication in Phys. Rev. Lett. 104, 112004, 2010

Scientific paper

10.1103/PhysRevLett.104.112004

The process $\gamma \gamma \to \phi \jpsi$ is measured for $\phi \jpsi$ masses between threshold and 5 GeV/${\it c}^2$, using a data sample of 825 fb$^{-1}$ collected with the Belle detector. A narrow peak of $8.8^{+4.2}_{-3.2}$ events, with a significance of 3.2 standard deviations including systematic uncertainty, is observed. The mass and natural width of the structure (named X(4350)) are measured to be $(4350.6^{+4.6}_{-5.1}(\rm{stat})\pm 0.7(\rm{syst})) \hbox{MeV}/{\it c}^2$ and $(13^{+18}_{-9}(\rm{stat})\pm 4(\rm{syst})) \hbox{MeV}$, respectively. The product of its two-photon decay width and branching fraction to $\phi\jpsi$ is $(6.7^{+3.2}_{-2.4}(\rm{stat}) \pm 1.1(\rm{syst})) \hbox{eV}$ for $J^P=0^+$, or $(1.5^{+0.7}_{-0.6}(\rm{stat}) \pm 0.3(\rm{syst})) \hbox{eV}$ for $J^P=2^+$. No signal for the $Y(4140)\to \phi \jpsi$ structure reported by the CDF Collaboration in $B\to K^+ \phi \jpsi$ decays is observed, and limits of $\Gamma_{\gamma \gamma}(Y(4140)) \BR(Y(4140)\to\phi \jpsi)<41 \hbox{eV}$ for $J^P=0^+$ or $<6.0 \hbox{eV}$ for $J^P=2^+$ are determined at the 90% C.L. This disfavors the scenario in which the Y(4140) is a $D_{s}^{\ast+} {D}_{s}^{\ast-}$ molecule.

Affiliated with

Also associated with

No associations

Rating

Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for a new resonance and search for the Y(4140) in $γ γ\to φJ/ψ$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-532901