Search for the C-parity violating process J/psi ---> gamma gamma via psi(2S) ---> pi+ pi- J/psi
Sep, 2007Citations per year
Abstract: (arXiv)
Using 14.0\times 10^6 \psi(2S) events collected with the BES-II detector, the C-parity violating process J/psi->gamma gamma via psi(2S)->pi+pi- J/psi is studied. We determine a new upper limit for the J/psi->gamma gamma branching ratio of B(J/psi->gamma gamma)<2.2\times 10^{-5} at the 90% C.L., which is about 20 times lower than the previous measurement.- 13.20.Gd
- 13.25.Gv
- 14.70.Bh
- 13.40.Hq
- electron positron: colliding beams
- electron positron: annihilation
- psi(3685): electroproduction
- psi(3685): hadronic decay
- J/psi(3100): radiative decay
- photon: pair production
References(12)
Figures(0)