Weak decays of doubly heavy baryons: “decay constants”

被引：0

作者：

胡晓会 ^{[1
]}

沈月龙 ^{[2
]}

王伟 ^{[1
]}

赵振兴 ^{[1
]}

机构：

[1] INPAC,Shanghai Key Laboratory for Particle Physics and Cosmology,MOE Key Laboratory for Particle Physics, Astrophysics and Cosmology,School of Physics and Astronomy, Shanghai Jiao-Tong University

[2] College of Information Science and Engineering, Ocean University of China

来源：

Chinese Physics C | 2018年 / 12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：

doubly heavy baryons; decay constant; QCD sum rules;

D O I：

暂无

中图分类号：

O571.6 [重离子核物理];

学科分类号：

摘要：

Inspired by the recent observation of the Ξ;)by the LHCb Collaboration, we explore the "decay constants" of doubly heavy baryons in the framework of QCD sum rules. With the Ξ;c),Ξ;,Ξ;, and ?;,?;,?;baryons interpolated by three-quark operators, we calculate the correlation functions using the operator product expansion and include the contributions from operators up to dimension six. On the hadron side, we consider both contributions from the lowest-lying states with JP=1/2;and from negative parity baryons with JP=1/2;. We find that the results are stable and the contaminations from negative parity baryons are not severe. These results are ingredients for the QCD study of weak decays and other properties of doubly-heavy baryons.

引用

页码：13 / 22

页数：10

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