2015/10/31 by Matteo Beccaria, Arkady A. Tseytlin · 1 citation
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1007/jhep01(2016)001
32 pages, v4: Added footnotes 8, 25, 26 clarifying that the available data leads to a 1-parameter family of the conformal anomaly coefficients c_1, c_2 as functions of chiral anomaly coefficients; the results for c_i in recent arXiv:1702.03518 also belong to this family
arxiv created 2017/02/15 · arxiv updated 2017/02/16
We propose general relations between the conformal anomaly and the chiral (R-symmetry and gravitational) anomaly coefficients in 6d (1,0) superconformal theories. The suggested expressions for the three type B conformal anomaly c-coefficients complement the expression for the type A anomaly a-coefficient found in arXiv:1506.03807. We check them on several examples -- the standard (1,0) hyper and tensor multiplets as well as some higher derivative short multiplets containing vector fields that generalize the superconformal 6d vector multiplet discussed in arXiv:1506.08727. We also consider a family of higher derivative superconformal (2,0) 6d multiplets associated to 7d multiplets in the KK spectrum of 11d supergravity compactified on S4. In particular, we prove that (2,0) 6d conformal supergravity coupled to 26 tensor multiplets is free of all chiral and conformal anomalies. We discuss some interacting (1,0) superconformal theories, predicting the c-coefficients for the "E-string" theory on multiple M5-branes at E8 9-brane and for the theory describing M5-branes at an orbifold singularity. Finally, we elaborate on holographic computation of subleading corrections to conformal anomaly coefficients coming from R2+R3 terms in 7d effective action, revisiting, in particular, the (2,0) theory case.