Observation of J/psi-->3gamma.
نویسندگان
چکیده
We report the first observation of the decay J/psi-->3gamma. The signal has a statistical significance of 6sigma and corresponds to a branching fraction of B(J/psi-->3gamma)=(1.2+/-0.3+/-0.2)x10;{-5}, in which the errors are statistical and systematic, respectively. The measurement uses psi(2S)-->pi;{+}pi;{-}J/psi events acquired with the CLEO-c detector operating at the CESR e;{+}e;{-} collider.
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ورودعنوان ژورنال:
- Physical review letters
دوره 101 10 شماره
صفحات -
تاریخ انتشار 2008