Analysis of the strong coupling form factors of ΣbN B and ΣcN D in QCD sum rules

被引：8

作者：

Yu, Guo-Liang ^{[1
]}

Wang, Zhi-Gang ^{[1
]}

Li, Zhen-Yu ^{[2
]}

机构：

[1] North China Elect Power Univ, Dept Math & Phys, Baoding 071003, Peoples R China

[2] Guizhou Normal Coll, Sch Phys & Elect Sci, Guiyang 550018, Guizhou, Peoples R China

来源：

CHINESE PHYSICS C | 2017年 / 41卷 / 08期

关键词：

sum rules; coupling constants; baryons; ASTERISK; VERTEX; MESON; DECAY; CONSTANTS; BARYONS; MASSES;

D O I：

10.1088/1674-1137/41/8/083104

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In this article, we study the strong interaction of the vertices Sigma bNB and Sigma cND using the three-point QCD sum rules under two different Dirac structures. Considering the contributions of the vacuum condensates up to dimension 5 in the operation product expansion, the form factors of these vertices are calculated. Then, we fit the form factors into analytical functions and extrapolate them into time-like regions, which gives the coupling constants. Our analysis indicates that the coupling constants for these two vertices are G(Sigma bNB) = 0.43 +/- 0.01 GeV-1 and G(Sigma cND) = 3.76 +/- 0.05 GeV-1.

引用

页数：8

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