Konu "Baryonium" için Makale listeleme
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Observation of an anomalous line shape of the eta 'pi(+)pi(-) mass spectrum near the p(p)over-bar mass threshold in j/psi -> gamma eta 'pi(+)pi(-)
(2016)Using 1.09 x 10(9) J/psi events collected by the BESIII experiment in 2012, we study the J / psi -> gamma eta'pi(+)pi(-) process and observe a significant abrupt change in the slope of the eta'pi(+)pi(-) invariant mass ...