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First observation of the isospin violating decay j/psi -> lambda(sigma)over-bar(0) + c.c.
(American Physical Society, 2012-08-15)
Using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, we present results of a study of J/psi -> gamma Lambda(Lambda) over bar and report the first observation of the isospin violating ...
Partial wave analysis of J/psi -> gamma eta eta
(American Physical Society, 2013-05-21)
Based on a sample of 2.25 x 10(8) J/psi events collected with the BESIII detector at BEPCII, a full partial wave analysis on J/psi -> gamma eta eta was performed using the relativistic covariant tensor amplitude method. ...