We compute the conformal anomaly in the free d = 6 superconformal (2,0) tensor
multiplet theory on generic curved background. Up to a trivial covariant totalderivative
term, it is given by the sum of the type A part proportional to the 6-d
Euler density, and the type B part containing three independent conformal invariants:
two CCC contractions of Weyl tensors and a C?2C + ... term. Multiplied by the
factor 4N3, the latter Weyl-invariant part of the anomaly reproduces exactly the corresponding
part of the conformal anomaly of large N multiple M5-brane (2,0) theory
as predicted (hep-th/9806087) by AdS7 supergravity on the basis of AdS/CFT correspondence.
The coefficients of the type A anomaly differ by the factor 4
7 ? 4N3, so
that the free tensor multiplet anomaly does not vanish on a Ricci-flat background. The
coefficient 4N3 is the same as found (hep-th/9703040) in the comparison of the tensor
multiplet theory and the d = 11 supergravity predictions for the absorption crosssection...