Abstract
In this article, we study the strong interaction of the vertices ΣbNB and ΣcND 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 GΣbNB = 0.43±0.01 GeV−1 and GΣcND = 3.76±0.05 GeV−1.
Highlights
By this time, many heavy baryons have been observed by BaBar, Belle and CLEO Collaborations[1– 4]such as 1+ 2 antitriplet states(Λ+c,Ξ+c,Ξ0c ), the 1+ 2 and 3+ 2 sextet states (Ωc,Σc,Σ′c) and (Ω∗c,Σ∗c,Σ∗c )[2].Besides, several S-wave bottom baryon states such as Λb,Σb,Σ∗b,Ξb and Ωb have been observed by CDF and LHCb Collaborations[5, 6]
The properties of the heavy baryons such as mass spectrum, radiative and strong decays have been studied by many researches, which is very important for us to further understand the heavy flavor physics[14,15,16,17,18,19,20,21]
The strong coupling constants associating with heavy baryons play an important role in describing the strong interaction among the heavy baryons and other participated hadrons
Summary
Many heavy baryons have been observed by BaBar, Belle and CLEO Collaborations[1–. The properties of the heavy baryons such as mass spectrum, radiative and strong decays have been studied by many researches, which is very important for us to further understand the heavy flavor physics[14,15,16,17,18,19,20,21]. In this regards, the strong coupling constants associating with heavy baryons play an important role in describing the strong interaction among the heavy baryons and other participated hadrons.
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