Boson decay is a research area in particle physics that involves studying the decay processes of boson particles such as the W and Z bosons. Bosons are fundamental particles that mediate the weak nuclear force, and they can decay into other particles through interactions with other particles. By studying boson decay processes, researchers can gain insight into the fundamental forces and particles that govern the behavior of the universe. This research area is important for understanding the Standard Model of particle physics and for testing theories beyond the Standard Model.