This paper analyzes the supersymmetric solutions to five and six-dimensional minimal (un)gauged supergravities for which the bilinear Killing vector constructed from the Killing spinor is null. We focus on the spacetimes which admit an additional SO(1, 1) boost symmetry. Upon the toroidal dimensional reduction along the Killing vector corresponding to the boost, we show that the solution in the ungauged case describes a charged, nonextremal black hole in a Friedmann-Lemaître-Robertson-Walker (FLRW) universe with an expansion driven by a massless scalar field. For the gauged case, the solution corresponds to a charged, nonextremal black hole embedded conformally into a Kantowski-Sachs universe. It turns out that these dimensional reductions break supersymmetry since the bilinear Killing vector and the Killing vector corresponding to the boost fail to commute. This represents a new mechanism of supersymmetry breaking that has not been considered in the literature before.
Black holes in an expanding universe and supersymmetry / D. Klemm, M. Nozawa. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 753(2016), pp. 110-116.
|Titolo:||Black holes in an expanding universe and supersymmetry|
|Parole Chiave:||High Energy Physics - Theory; High Energy Physics - Theory; General Relativity and Quantum Cosmology; Nuclear and High Energy Physics|
|Settore Scientifico Disciplinare:||Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.physletb.2015.12.006|
|Appare nelle tipologie:||01 - Articolo su periodico|