Long-range S-wave DD* interaction in covariant chiral effective field theory

被引：0
|
作者：
Zhai, Qing-Yu [1 ]
Liu, Ming -Zhu [2 ]
Lu, Jun-Xu [1 ]
Geng, Li-Sheng [1 ,3 ,4 ,5 ]
机构：
[1] Beihang Univ, Sch Phys, Beijing 102206, Peoples R China
[2] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
[3] Beihang Univ, Peng Huanwu Collaborat Ctr Res & Educ, Beijing 100191, Peoples R China
[4] Beihang Univ, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 102206, Peoples R China
[5] Chinese Acad Sci, Inst Modern Phys, Southern Ctr Nucl Sci Theory SCNT, Huizhou 516000, Guangdong, Peoples R China
来源：
PHYSICAL REVIEW D | 2024年 / 109卷 / 03期
基金：
中国国家自然科学基金;
关键词：
HADRON INTERACTIONS; TETRAQUARK STATES; MOLECULAR-STATES; LATTICE QCD; SYSTEMATICS; POTENTIALS;
D O I：
10.1103/PhysRevD.109.034015
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Motivated by the recent lattice QCD study of the DD* interaction at unphysical quark masses, we perform a theoretical study of the DD* interaction in covariant chiral effective field theory. In particular, we calculate the relevant leading-order two-pion exchange contributions. The results compare favorably with the lattice QCD results, supporting the conclusion that the intermediate-range DD* interaction is dominated by two-pion exchanges and the one-pion exchange contribution is absent. At a quantitative level, the covariant chiral perturbation theory results agree better with the lattice QCD results than their nonrelativistic counterparts, showing the relevance of relativistic corrections in the charm sector.
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页数：12
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