2020/04/30 by Niccolò Cribiori, Christoph Roupec, Magnus Tournoy +2 · 1 citation
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1007/jhep07(2020)189
published as JHEP07(2020)189 · 30 pages; v2: references added, minor improvements. Version published in JHEP
arxiv created 2020/07/30 · arxiv updated 2020/08/03
We discuss how to incorporate non-supersymmetric branes in compactifications of type II string theories. We particularly focus on flux compactifications on SU(3)× SU(3) structure manifolds to four dimensions, so that a linear N=1 supersymmetry is spontaneously broken by spacetime filling Dp-branes. Anti-Dp-branes are a very special subset of such branes but our analysis is generic. We show that the backreaction of non-supersymmetric branes can be incorporated into the standard 4d N=1 supergravity by including a nilpotent chiral multiplet. Supersymmetry in such setups is always spontaneously broken and non-linearly realized. In particular this means that, contrary to what was previously thought, brane supersymmetry breaking cannot be simply described by a D-term in 4d N=1 supergravity theories.