ABSTRACT

Weak interactions, as the name implies, are very weak compared to the strong and electromagnetic interactions. As a rough estimate of the strengths of different interactions, let us compare the strong, electromagnetic and weak forces between two protons separated by a distance of 1 fm, or 10−13 cm. If the strong force between them defines our unit of force, the electromagnetic force will be of order 10−2, and the weak force will be about 10−14 in this unit.