Observation of e(+)e(-) -> gamma X(3872) at BESIII
Observation of e(+)e(-) -> gamma X(3872) at BESIII
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在 BESIII 观测到 e( )e(-) -> gamma X(3872)
DOI：
10.1103/physrevlett.112.092001
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发表时间：
2014
影响因子：
8.6
通讯作者：
Calcaterra
中科院分区：
文献类型：
--
作者：
Ablikim M.;Achasov M. N.;Ai X. C.;Albayrak O.;Ambrose D. J.;An F. F.;An Q.;Bai J. Z.;Ferroli R. Baldini;Ban Y.;Bennett J. V.;Bertani M.;Bian J. M.;Boger E.;Bondarenko O.;Boyko I.;Braun S.;Briere R. A.;Cai H.;Cai X.;Cakir O.;Calcaterra
利用在BEPCII储存环上运行的BESIII探测器在4.009至4.420 GeV的质心能量下收集的数据样本，首次观察到该过程，统计显著性为。测得的质量与以前的测量结果一致。测量了质心能量为4.009，4.229，4.260和4.360 GeV的截面积和分支分数。我们的测量结果与辐射跃迁过程的预期一致。
With data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.009 to 4.420 GeV, the processis observed for the first time with a statistical significance of. The measured mass of theis, in agreement with previous measurements. Measurements of the product of the cross sectionand the branching fractionat center-of-mass energies 4.009, 4.229, 4.260, and 4.360 GeV are reported. Our measurements are consistent with expectations for the radiative transition process.