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

QCD Sum Rules Analysis of Weak Decays of Doubly-Heavy Baryons
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双重重子弱衰变的QCD和规则分析

DOI:
10.1140/epjc/s10052-020-8096-2
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发表时间:
2019-02
影响因子:
4.4
通讯作者:
Zhao Zhen-Xing
Zhao Zhen-Xing
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shi Yu-Ji;Wang Wei;Zhao Zhen-Xing

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我们用三点QCD求和规则计算了重重子的弱衰变形式因子。利用Cutkosky规则推导了双色散关系。我们将微扰贡献和凝聚贡献包括到第五维,并指出微扰贡献和最低维的凝聚占主导地位。对一部分胶子-胶子凝聚的估计表明胶子-胶子凝聚的作用不大。有了这些形式因素,我们提出了半光子衰变的现象学研究。未来的实验设施可以验证这些预测,并加深我们对双重重子衰变动力学的理解。
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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QQQQ弱衰变的光锥和规则分析
DOI: 10.1140/epjc/s10052-019-7014-y
发表时间: 2019
影响因子: 4.4
作者:
Shi Yu-Ji;Xing Ye;Zhao Zhen-Xing
通讯作者: Zhao Zhen-Xing
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发表时间: 2018
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