Which of the fundamental interactions governs the following decay? $\pi ^ { + } \longrightarrow e ^ { + } + \nu$
A) Strong nuclear
B) Electromagnetic
C) Gravitational
D) Weak nuclear

Question

Quizplus · Accepted Answer

This decay involves the transformation of a charged pion into a charged lepton (positron) and a neutrino. Since the lepton number is not conserved in this process, it involves the weak interaction. The strong interaction governs the interactions between quarks and the electromagnetic interaction governs interactions between charged particles. Gravitational interactions are far too weak to be relevant on this scale.

Which of the Fundamental Interactions Governs the Following Decay π+⟶e++ν\pi ^ { + } \longrightarrow e ^ { + } + \nuπ+⟶e++ν

Which of the Fundamental Interactions Governs the Following Decay $\pi ^ { + } \longrightarrow e ^ { + } + \nu$