On the nature of the phase transition in SU(N), Sp(2) and E(7) Yang–Mills theory Jens Braun, Astrid Eichhorn, Holger Gies and JanM. Pawlowski Eur. Phys. J. C, 70 3 (2010) 689-702 Published online: 11 November 2010 DOI: 10.1140/epjc/s10052-010-1485-1