Generalized Gauge Field Approach To Lightlike Branes

AbstractWe propose a general action describing the dynamics of lightlike(LL) p-branes in any odd (p + 1) world-volume dimensions. Next,we consider self-consistent coupling of LL-membranes (p=2) to D=4 Einstein-Maxwell system plus a D = 4 three-index antisymmetrictensor gauge field. The LL-brane serves as a material and chargesource for gravity and electromagnetism and, furthermore, it producesa dynamical space-varying cosmological constant. We present staticspherically-symmetric solutions where the space-time consists of tworegions with different black-hole-type geometries and different valuesfor dynamically generated cosmological constant, separated by the LL-brane which “straddles” their common event horizon. PACS numbers: 11.25.-w, 04.70.-s, 04.50.+h 1 Introduction In the context of non-perturbative string theory there arise several types ofhigher-dimensional membranes (p-branes, Dp-branes) which play a crucialrole in the description of string dualities, microscopic physics of black holes,1