Photons mediate electromagnetic force interactions from "summary" of The Quantum Theory of Fields by Steven Weinberg,Weinberg S
The electromagnetic force is one of the fundamental forces in nature, responsible for interactions between charged particles. According to quantum field theory, these interactions are mediated by particles known as gauge bosons. In the case of the electromagnetic force, the gauge boson is the photon. Photons are massless particles that travel at the speed of light. They carry the electromagnetic force between charged particles, such as electrons and protons. When two charged particles interact, they exchange photons, which transmit the electromagnetic force between them. T...
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