QCD弦模型下含有两个开重味四夸克质量谱研究  

Study on the Mass Spectrum of Open-flavor double Tetraquarks under the QCD String Model

作　　者：刘文念 马奭文 赵新军 Liu Wennian;Ma Shiwen;Zhao Xinjun(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics,College of Physical Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China;Laboratory of Micro-Nano Electro Biosensors and Bionic Devices,Yili Normal University,Yining,Xinjiang 835000,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆凝聚态相变与微结构实验室,新疆伊宁835000 [2]伊犁师范大学,微纳电传感器技术与仿生器械实验室,新疆伊宁835000

出　　处：《伊犁师范大学学报（自然科学版）》2022年第2期19-28,共10页Journal of Yili Normal University：Natural Science Edition

基　　金：伊犁师范大学校级一般项目(2021YSYB100).

摘　　要：在diquark-antidiquark图像中,计算了所有开味双重四夸克T_(QQ)(QQqq)的基态质量;使用QCD(Quantum Chromodinamics)转动弦模型推导出的线性Regge关系来描述T_(QQ)的自旋平均质量,结合对diquark-antidiquark之间自旋-自旋相互作用引起的质量劈裂分析,可得到所有开味T_(QQ)的基态质量谱;预测结果与其他理论值进行了比较.结果表明,双底味四夸克态bbnn(IJ^(P)=01^(+))的质量低于BB^(∗)的阈值122 MeV,而(bbns(IJ^(P)=1/2,1^(+)))的质量低于BB_(s)^(*)的阈值26 MeV.因此它们在强衰变和电磁衰变下可能是稳定的.The masses of all open-flavored double tetraquarksT_(QQ)(QQqq) are calculated under model diquark-antidiquark image.The linear Regge relationship directly derived from the QCD(Quantum Chromodinamics)string model is used to describe the spin-averaged mass of the T_(QQ) states,combined analysis of mass splitting induced by spin-spin interactions between diquarkantidiquark,all the ground state masses of the open-flavor T_(QQ) can be obtained.The predicted results were compared with other theoretical values,which show that the double bottom tetraquark statebbnn(IJ^(P)=01^(+))has a mass below the BB^(∗) threshold of 122 MeV,whilebbns(IJ^(P)=1/2,1^(+))has a mass below theBB_(s)^(*) threshold of 26 MeV,so they may be stable under strong decay and electromagnetic decay.

关 键 词：开味双重四夸克 QCD转动弦模型 diquark-antidiquark Regge关系 

分 类 号：O571[理学—粒子物理与原子核物理]