C T for non-unitary CFTs in higher dimensions

The coefficient c t of the conformal energy-momentum tensor two-point function is determined for the non-unitary scalar cfts with four- and six-derivative kinetic terms. the results match those expected from large-n calculations for the cfts arising from the o(n) non-linear sigma and gross-neveu models in specific even dimensions. c t is also calculated for the cft arising from (n − 1)-form gauge fields with derivatives in 2n + 2 dimensions. results for (n − 1)-form theory extended to general dimensions as a non-gauge-invariant cft are also obtained; the resulting c t differs from that for the gauge-invariant theory. the construction of conformal primaries by subtracting descendants of lower-dimension primaries is also discussed. for free theories this also leads to an alternative construction of the energy-momentum tensor, which can be quite involved for higher-derivative theories.