Analysis of the strong vertices of Sigma*cND and Sigma*bNB in QCD sum rules

作者：Yu, Guo-Liang^*; Wang, Zhi-Gang; Li, Zhen-Yu

来源：International Journal of Modern Physics A, 2017, 32(35): 1750203.

DOI：10.1142/S0217751X17502037

• Sum rules
• coupling constants
• baryons

The strong coupling constants not only are important to understand the strong interactions of the heavy baryons, but can also help us reveal the nature and structure of these baryons. Additionally, researchers indeed have made great efforts to calculate some of the strong coupling constants, g Omega*(c)Omega*(c)phi, g Omega*(c)(sic)*K-c*, g(sic)*(c)Sigma*K-c*, g Omega*(b)Omega*(b)phi, g(sic)*(b)Sigma*K-b*, g(sic)*(b)(sic)(b)pi, g(sic)*(c)(sic)(c)pi, g Lambda bNB*, g Lambda N-b*B*, g Lambda cND*, g Lambda N-c*D*, g Sigma cND*, g Sigma N-b* B*, g Sigma bNB*, g Sigma N-c*D*, etc. In this paper, we analyze the strong vertices Sigma*cND and Sigma*bNB using the three-point QCD sum rules under the Dirac structure of (sic)(sic)/gamma mu. We perform our analysis by considering the contributions of the perturbative part and the condensate terms of <(q) over barq > and . After the form factors are calculated, they are then fitted into analytical functions which are used to get the strong coupling constants for these two vertices. The final results are g Sigma*cND = 7.19(-3.11)(+8.49) +/- 1.76 and g Sigma*bNB = 10.54(-5.23)(+15.59) +/- 1.82.

• 出版日期2017-12-20
• 单位贵州师范学院; 华北电力大学（保定）; 华北电力大学