Introduction To Elementary Particles Solutions Manual Griffiths -

9.2 The gauge group of QCD is $SU(3)$.

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

6.2 The quark model explains the hadronic spectrum.

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

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

This solutions manual provides a comprehensive guide to the exercises and problems in "Introduction to Elementary Particles" by Griffiths. The solutions are presented in a clear and concise manner, making it an invaluable resource for students and researchers alike.

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

1.3 The antiparticle of the electron $e^{-}$ is the positron $e^{+}$.