# Homework Help: Anomaly of representations in SU(N)

1. Jun 9, 2010

### nickthequick

1. The problem statement, all variables and given/known data

The problem is the following: Compute the ratio of the anomaly of the N to that of the N(N-1)/2 representations in SU(n)

2. Relevant equations

Georgi claims that you can find the anomaly, A(R) of the [1] representation of SU(n) by calculating the anomaly of SU(3) (subgroup of SU(N)) under which n transforms like a 3 and n-3 singlets.

3. The attempt at a solution

The anomaly of the fundamental rep is going to be 1 here in SU(3). I'm not exactly sure how to find the anomaly of the (n-3) singlets. Also, if I do attain A([1]) for SU(N), I'm not sure how to extend this to the other N and N(N-1)/2 reps.

Any insights would be appreciated.

Cheers

Last edited: Jun 9, 2010