Bele和BaBar实验γγ→DD-和γγ→ωJ/ψ数据的联合分析  

Combined analysis ofγγ→D D-andγγ→ωJ/ψdata from Belle and BaBar experiments

作　　者：周兴玉 咸秀梅 温亚冉 岳崇兴[1] ZHOU Xingyu;XIAN Xiumei;WEN Yaran;YUE Chongxing(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2024年第2期168-173,共6页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(11875157,12135005,12147214)。

摘　　要：B介子工厂实验Belle和BaBar通过研究双光子过程γγ→DD和γγ→ωJ/ψ,在DD不变质量谱上观测到了粲偶素χ_(c2)(2P),在ωJ/ψ不变质量谱上观测到了类粲偶素X(3915),有力地促进了粲偶素和类粲偶素的研究进展.限于统计量,这些分析工作均使用一个信号函数拟合实验数据.在使用单信号函数对这些实验数据进行联合拟合的基础上,尝试使用了双信号函数对这些实验数据进行联合拟合,所得结果为实验数据的诠释提供了一个新的视角,有助于进一步理解χ_(c2)(2P)和X(3915)的性质.The B-meson-factory experiments Belle and BaBar,via the studies of the two-photon processes ofγγ→D D-andγγ→ωJ/ψ,observed the charmonium stateχ_(c2)(2P)in the invariant-mass spectrum of D D-and the charmonium-like state X(3915)on the invariant-mass spectrum ofωJ/ψ,which greatly prompted the research progress of the charmonium and charmonium-like states.Limited by the statistics,single-signal functions were used to fit to experimental data in these analysis works.In this paper,we try to do a simultaneous fit using double-signal functions,in addition to single-signal functions,to analyze these experimental data.The obtained result provides a new perspective to the interpretation of the experimental data,and is helpful to our understandings of the properties ofχ_(c2)(2P)and,in particular,X(3915).

关 键 词：粲偶素 类粲偶素 χ_(c2)(2P) X(3915) 

分 类 号：O484.1[理学—固体物理]