Search for charmonium and charmonium-like states in $\\Upsilon(2S)$ radiative decays
Journal
Physical Review
Journal Volume
D84
Pages
071107
Date Issued
2011-08
Author(s)
Abstract
Using a sample of 158 × 106 γ(2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in γ(2S) radiative decays. No significant XcJ or ηc signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B(γ(2S) γXc0)< 1:0 × 10-4, B(γ(2S) γXc1) < 3:6 × 10-6, B(γ(2S) γXc2) < 1:5 × 10-5, and B(γ(2S) γηc) < 2:7 × 10-5. No significant signal of any charmoniumlike state is observed, and we obtain the limits B(γ(2S) γX(3872)) X B(X(3872) π+π- J/ψ)<0.8 × 10-6, B(γ(2S) γX(3872))X B(X(3872) π+π-π0J/ψ)<2:4 × 10-6, B(γ(2S) γX(3915)) X B(X(3915) ωJ/ψ)<2:8 × 10-6, B(γ(2S) γY(4140)) X B(Y(4140) ΦJ/ψ)) < 1:2 × 10-6, and B(γ(2S) γX(4350)) X B(X(4350) ΠJ/ψ) < 1:3 × 10-6 at 90% C. L.
Type
journal article