# Contents

## Idea

Besides the forces of electromagnetism and gravity there are two more fundamental gauge fields in the standard model of particle physics.

The weak nuclear force is described by a gauge field with gauge group the special unitary group $\mathrm{SU}\left(2\right)$. It controls aspects of the beta decay?.

The weak nuclear force is described by a gauge field with gauge group the special unitary group $\mathrm{SU}\left(3\right)$ (QCD . It governs the interaction between quarks.

## References

Revised on January 10, 2013 20:07:16 by Urs Schreiber (89.204.153.52)