Study of two-photon decays of pseudoscalar mesons via J/Psi radiative decays
Study of two-photon decays of pseudoscalar mesons via J/Psi radiative decays
复制标题
通过 J/Psi 辐射衰变研究赝标量介子的双光子衰变
DOI：
10.1103/physrevd.97.072014
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发表时间：
2018
影响因子：
5
通讯作者：
Cak
中科院分区：
文献类型：
--
作者：
Ablikim M.;Achasov M. N.;Ahmed S.;Albrecht M.;Amoroso A.;An F. F.;An Q.;Bai J. Z.;Bai Y.;Bakina O.;Ferroli R. Baldini;Ban Y.;Bennett D. W.;Bennett J. V.;Berger N.;Bertani M.;Bettoni D.;Bian J. M.;Bianchi F.;Boger E.;Boyko I.;Briere R. A.;Cai H.;Cai X.;Cak
利用BESIII探测器在BEPCII对撞机上收集的事件样本，我们研究了伪标量介子，，，，，，的双光子衰减和使用事件的辐射衰减。在双光子质谱中清晰地观察到、、介子，确定了分支分数为B(J/ψ→γπ0→3γ)=（3.57±0.12±0.16）×10-5， B(J/ψ→γη→3γ)=（4.42±0.04±0.18）×10-4， B(J/ψ→γη′→3γ)=（1.26±0.02±0.05）×10-4，其中第一个误差为统计误差，第二个误差为系统误差。在双光子质谱中没有观察到明显的信号，并且在90%的置信水平上获得了产物分支分数的上限。
Using a sample ofevents collected with the BESIII detector at the BEPCII collider, we study the two-photon decays of the pseudoscalar mesons,,,,,, andinradiative decays usingevents. The,, andmesons are clearly observed in the two-photon mass spectra, and the branching fractions are determined to be B(J/ψ→γπ0→3γ)=(3.57±0.12±0.16)×10-5, B(J/ψ→γη→3γ)=(4.42±0.04±0.18)×10-4, and B(J/ψ→γη′→3γ)=(1.26±0.02±0.05)×10-4, where the first error is statistical and the second is systematic. No clear signal for,,oris observed in the two-photon mass spectra, and upper limits at the 90% confidence level on the product branching fractions are obtained.