标题:Measurement of J/psi -> Xi(1530+)(-) (Xi)over-bar(+) and evidence for the radiative decay Xi(153)(-) -> gamma Xi(-)
作者:Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, Y.; Bakina, 更多
作者机构:[Ablikim, M.; An, F. F.; Cai, X.; Cao, G. F.; Cao, N.; Chang, J. F.; Chang, W. L.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, Y. B.; Dai, 更多
通讯作者:Ji, QP;Qi, HR
通讯作者地址:[Ji, QP]Henan Normal Univ, Xinxiang 453007, Henan, Peoples R China;[Qi, HR]Tsinghua Univ, Beijing 100084, Peoples R China.
来源:PHYSICAL REVIEW D
出版年:2020
卷:101
期:1
DOI:10.1103/PhysRevD.101.012004
摘要:The SU(3)-flavor violating decay J/psi -> Xi(1530)(-) (Xi) over bar (+) + c.c. is studied using (1310.6 +/- 7.0) x 10(6) J/psi events collected with the BESIII detector at BEPCII, and the branching fraction is measured to be B(J/psi -> Xi(1530)(-) (Xi) over bar (+) + c.c.) = (3.17 +/- 0.02(stat) +/- 0.08(syst)) x 10(-4). This result is consistent with previous measurements with an order of magnitude improved precision. The angular parameter for this decay is measured for the first time and is found to be alpha = -0.21 +/- 0.04(stat) +/- 0.06(syst). In addition, we report evidence for the radiative decay Xi(1530)(-) -> gamma Xi(-) with a significance of 3.9 sigma, including the systematic uncertainties. The 90% confidence level upper limit on the branching fraction is determined to be B(Xi(1530)(-) -> gamma Xi(-)) <= 3.7%.
收录类别:SCIE
资源类型:期刊论文
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