In particle physics, a Yukawa potential is a potential of the form where g is a magnitude scaling constant, i.e. is the amplitude of potential, m is the mass of the affected particle, r is the radial distance to the particle, and k is another scaling constant, which finally the product of km is the inverse scope. The potential is monotone increasing, implying that the force is always attractive. The Coulomb potential of electromagnetism is an example of a Yukawa potential with e− equal to 1 everywhere; this is taken to mean that the photon mass m is equal to 0. In interactions between a meson field and a fermion field, the constant g is equal to the coupling constant between those fields. In the case of the nuclear force, the fermions would be a proton and another proton or a neutron. Wikipedia [ - ]

In particle physics, a Yukawa potential is a potential of the form where g is a magnitude... [ + ]