Question

How does weak force differ from the other fundamental forces?

Answer 1

The force carriers of the weak force have mass and there is more then one of them (`W^{+}`, `W^{-}` and `Z` bosons).

Explanation:

In the standard Model.

The force carriers of the electromagnetic force are photons, which have no mass and travel at the speed of light.

The force carriers of the strong force are gluons, which have no mass and travel at the speed of light.

The force carriers of the gravitational force are gravitons, which have no mass and travel at the speed of light.

The force carriers of the weak force are the `W^{+}`, `W^{-}` and `Z` bosons, which have mass and cannot travel at the speed of light. They have mass because of how they interact with the Higgs boson.