QCD Sum Rules Analysis of Weak Decays of Doubly-Heavy Baryons

被引：43
作者：
Shi, Yu-Ji [1 ]
Wang, Wei [1 ]
Zhao, Zhen-Xing [1 ]
机构：
[1] Shanghai Jiao Tong Univ, INPAC, SKLPPC, Sch Phys & Astron, Shanghai 200240, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 06期
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
FORM-FACTORS; TETRAQUARKS;
D O I：
10.1140/epjc/s10052-020-8096-2
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We calculate the weak decay form factors of doubly-heavy baryons using three-point QCD sum rules. The Cutkosky rules are used to derive the double dispersion relations. We include perturbative contributions and condensation contributions up to dimension five, and point out that the perturbative contributions and condensates with lowest dimensions dominate. An estimate of a part of the gluon-gluon condensates show that it plays a less important role. With these form factors at hand, we present a phenomenological study of semileptonic decays. The future experimental facilities can test these predictions, and deepen our understanding of the dynamics in the decays of doubly-heavy baryons.
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页数：20
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