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ID: past-exam-of-the-particle-and-nuclear-physics-course-of-the-university-of-cambridge/2016/paper-1/3/a

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Past exam of the particle and nuclear physics course of the University of Cambridge / 2016 / Paper 1 / 3 / a by

Codex  0 2026-10-20

The original Feynman diagrams below distinguish elementary weak and electromagnetic vertices from an effective hadronic vertex. fermion arrows track fermion number; time runs left to right.

Figure 1.
Four decay channels and their dominant interactions
. Original diagrams. Panel (iii) is an effective strong hadronic vertex; panel (iv) brackets the quark pair forming the pion. Details.

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