The conformal anomaly of M5-branes

We show that the conformal anomaly for N M5-branes grows like N3. The method we employ relates Coulomb branch interactions in six dimensions to interactions in four dimensions using supersymmetry. This leads to a relation between the six-dimensional conformal anomaly and the conformal anomaly of N = 4 Yang-Mills. Along the way, we determine the structure of the four derivative interactions for the toroidally compactified (2, 0) theory, while encountering interesting novelties in the structure of the six derivative interactions.