منابع مشابه
The φNN coupling from chiral loops
Starting from effective Lagrangians which combine a gauge formulation of Vector Meson Dominance with Chiral Lagrangians, the coupling of the φ to the nucleon, which is zero at tree level due to the OZI rule, is calculated perturbatively considering loop contributions to the electric and magnetic form factors. We obtain reasonably smaller values for both form factors than those for ρN N and cons...
متن کاملThe strong coupling constant
In this paper we fix our attention, on hadron structure, and show that also the strong interaction strength αS, ordinarily called the “(perturbative) coupling–constant square”, can be evaluated within our theory, and found to decrease (increase) as the “distance” r decreases (increases). This yields both the confinement of the hadron constituents, and their asymptotic freedom: in qualitative ag...
متن کاملcoupling constant
We calculate the π∆∆ coupling gπ0∆++∆++ using light cone QCD sum rule. Our result is gπ0∆++∆++ = (11.8 ± 2.0). We compare various model predictions. PACS numbers: 12.39.Fe, 14.20.Gk The π∆∆ coupling constant g1, like the nucleon axial charge gA, is a basic parameter which enters the loop calculation in all processes involved with delta resonance [1] in chiral perturbation theory. Unfortunately ...
متن کاملDFT Application to the Analysis of Quadrupole Coupling Constant of Aluminum Methyl Chloride Dimers
The analysis of the 27Al and 35Cl quadrupole coupling parameters of aluminum methyl chloride dimers were carried out on the basis of the density functional theory (DFT). The available experimental values of quarupole coupling constants were compared with their calculated ones. In this investigation, the correlations were made between calculated 27Al and 35Cl nuclear quadrupole coupling constant...
متن کامل0 π ∆ ∆ coupling constant
We calculate the π∆∆ coupling gπ0∆++∆++ using light cone QCD sum rule. Our result is gπ0∆++∆++ = (11.8 ± 2.0). PACS numbers: 12.39.Fe, 14.20.Gk The π∆∆ coupling constant g1, like the nucleon axial charge gA, is a basic parameter which enters the loop calculation in all processes involved with delta resonance [1] in chiral perturbation theory. Unfortunately it is not directly accessible experime...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1992
ISSN: 0375-9474
DOI: 10.1016/0375-9474(92)90433-k