Weinberg Angle

Discovered by: Steven Weinberg and Mohammad Abdus Salam.

What is it? A parameter in the Weinberg–Salam theory of the electroweak interaction, part of the Standard Model of particle physics.

Why is it important? It is the angle by which spontaneous symmetry breaking rotates the original W0 and B0 vector boson plane, producing as a result the Z0 boson, and the photon.