Non-singular black holes from gravity-matter-brane lagrangians

Understand

We consider self-consistent coupling of bulk Einstein-Maxwell-Kalb-Ramond system to codimension-one charged lightlike p-brane with dynamical (variable) tension (LL-brane).

• The latter is described by a manifestly reparametrization-invariant world-volume action significantly different from the ordinary Nambu-Goto one.
• We show that the LL-brane is the appropriate gravitational and charge source in the Einstein-Maxwell-Kalb-Ramond equations of motion needed to generate a self-consistent solution describing non-singular black hole.
• The latter consists of de Sitter interior region and exterior Reissner-Nordstroem region glued together along their common horizon (it is the inner horizon from the Reissner-Nordstroem side).