NHEG Mechanics: Laws of Near Horizon Extremal Geometry (Thermo)Dynamics

K. Hajian, A. Seraj, M. M. Sheikh-Jabbari

Near Horizon Extremal Geometries (NHEG) are solutions to gravity theories with $SL(2,R)\times U(1{)}^N$ (for some N) symmetry, are smooth geometries and have no event horizon, unl…