Analysis of the X(3960) and related tetraquark molecular states via the QCD sum rules

被引：22
|
作者：
Xin, Qi [1 ,2 ]
Wang, Zhi-Gang [1 ]
Yang, Xiao-Song [1 ]
机构：
[1] North China Elect Power Univ, Dept Phys, Baoding 071003, Peoples R China
[2] North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China
来源：
AAPPS BULLETIN | 2022年 / 32卷 / 01期
关键词：
RESONANCE PHYSICS;
D O I：
10.1007/s43673-022-00070-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this work, we study the DD<overline>, DD, DD<overline>s, DDs, DsDs<overline> and DsDs tetraquark molecular states with the J(PC )= 0(++) via the QCD sum rules. The prediction MDsDs<overline>=3.98 +/- 0.10GeV is in very good agreement with the experimental value M-X(3960) = 3956 +/- 5 +/- 10MeV from the LHCb collaboration and supports assigning the X(3960) as the Ds+Ds- molecular state with the J(PC )= 0(++). We take account of our previous works on the four-quark states consisting of two color-neutral clusters and acquire the mass spectrum of the ground state hidden-charm and doubly-charm tetraquark molecular states.
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页数：7
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