1211.4030 (Francesco Benini et al.)

Exact two-dimensional superconformal R-symmetry and c-extremization    [PDF]

Francesco Benini, Nikolay Bobev

We uncover a general principle, dubbed c-extremization, which determines the exact R-symmetry of a two-dimensional unitary superconformal field theory with N=(0,2) supersymmetry. To illustrate its utility, we study superconformal theories obtained by twisted compactifications of four-dimensional N=4 super-Yang-Mills on Riemann surfaces, and construct their gravity duals.

View original: http://arxiv.org/abs/1211.4030