Introduction To Elementary Particles Solutions Manual Griffiths May 2026

2.3 The $\pi$ meson was discovered in 1947 by Cecil Powell.

6.2 The quark model explains the hadronic spectrum.

9.1 The gauge group of QED is $U(1)$.

6.1 The quark model predicts the existence of baryons and mesons.

2.1 The first particle accelerator was built in 1930 by Cockcroft and Walton.

2.2 The concept of the neutrino was first proposed by Pauli in 1930.

7.1 The weak interaction is responsible for $\beta$ decay.