Author:
Wang Hongpeng,Yuan Chang-Zheng
Abstract
Abstract
By analyzing existing data on pseudoscalar charmonium decays, we obtain the ratio of the branching fractions of
and
decays into ten different final states with light hadrons. For the first time, we test the two existing theoretical predictions of these decays and find that the experimental data are significantly different from both of them. The lack of observation of any decay mode with higher rate in
than in
decays suggests very unusual decay dynamics in pseudoscalar charmonium decays to be identified. We also report the first model-independent evaluation of the partial width of
(
keV) and improve determination of that of
(
keV). The latter shows a tension with the most recent lattice QCD calculation.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Subject
Astronomy and Astrophysics,Instrumentation,Nuclear and High Energy Physics
Cited by
6 articles.
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