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Nuclear Force Strength

The magnitude of the strong nuclear force, a fundamental constant determining the binding energy of nucleons within the nucleus.
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The statement of the theorem

The strong nuclear force strength is characterized by the coupling constant gg (or GAG_{A} for axial coupling). In the context of the effective Hamiltonian H^eff\hat{H}_{eff} derived from Quantum Chromodynamics (QCD), the interaction term is proportional to gg: \nH^eff=H^0+∑i<jgOij\hat{H}_{eff} = \hat{H}_0 + \sum_{i<j} g \mathcal{O}_{ij} \nwhere Oij\mathcal{O}_{ij} is an operator describing the interaction between nucleons ii and jj. The binding energy per nucleon, B/AB/A, is directly related to the magnitude of gg via the semi-empirical mass formula (SEMF) approximation: \nBA≈av−asA−1/3−acZ(Z−1)/A1/3…\frac{B}{A} \approx a_{v} - a_{s} A^{-1/3} - a_{c} Z(Z-1)/A^{1/3} \dots \nwhere ava_v is proportional to gg.
Source: Wikipedia