Results 41 to 50 of about 1,034,510 (257)
False Vacuum Chaotic Inflation: The New Paradigm? [PDF]
, 1994 Recent work is reported on inflation model building in the context of supergravity and superstrings, with special emphasis on False Vacuum (`Hybrid') Chaotic Inflation.
A. D. Linde +9 more
core +2 more sources
Minimal four-family supergravity model [PDF]
Physical Review D, 1996 56 pages, requires phyzzx.tex, tables.tex, figures not included, full postscript files including figures via anonymous ftp at ftp://ucdhep.ucdavis.edu/gunion/ , get 4gen.ps, 4gen_figs1to12.ps, and 4gen_figs13to19 ...
Douglas W. McKay, H. Pois, J.F. Gunion
openaire +4 more sources
Testing primordial black holes as dark matter in supergravity from gravitational waves
Physics Letters B, 2021 We explore the Gravitational Waves (GW) phenomenology of a simple class of supergravity models that can explain and unify inflation and Primordial Black Holes (PBH) as Dark Matter (DM).
Yermek Aldabergenov +2 more
doaj
On destabilizing divergences in supergravity models [PDF]
Physics Letters B, 1995 We show that, for standard N=1 supergravity coupled to chiral matter, if the Kahler potential has no terms linear in chiral superfields then none are generated through quad. div. one--loop corrections. If however =0 and susy is spontaneously broken, linear terms are present and new linear terms may be generated due to nonrenormalizable couplings in K ...
openaire +3 more sources
On Nonstandard Vacuua in Minimal Supergravity Models [PDF]
Journal of High Energy Physics, 2003 The plethora of scalar fields participating in the formulation of a softly broken supersymmetric theory can threat the stability of the standard vacuum. The generic situation is twofold. Directions in scalar field space may exist along which the potential becomes unbounded from below or local minima deeper than the standard one are likely to appear ...
Gioutsos, D. V., Vayonakis, C. E.
openaire +4 more sources
Building models of inflation in no-scale supergravity [PDF]
International Journal of Modern Physics D, 2020 After reviewing the motivations for cosmological inflation formulated in the formalism of supersymmetry, we argue that the appropriate framework is that of no-scale supergravity. We then show how to construct within this framework inflationary models whose predictions for the tilt in the spectrum of scalar perturbations, [Formula: see text], and the ...
Natsumi Nagata +9 more
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Non-abelian fermionic T-duality in supergravity
Journal of High Energy Physics, 2021 Field transformation rules of the standard fermionic T-duality require fermionic isometries to anticommute, which leads to complexification of the Killing spinors and results in complex valued dual backgrounds.
Lev Astrakhantsev +2 more
doaj +1 more source
The inflatino problem in supergravity inflationary models [PDF]
Physics Letters B, 2001 We consider the potential problems due to the production of inflatinos and gravitinos after inflation. Inflationary models with a single scale set by the microwave background anisotropies have a low enough reheat temperature to avoid problems with the thermal production of gravitinos.
Nilles H. P., Olive K. A., Peloso M.
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Supergravity from a Massive Superparticle and the Simplest Super Black Hole [PDF]
Nucl.Phys. B514 (1998) 355-378, 1997 We describe in superspace a theory of a massive superparticle coupled to a version of two dimensional N=1 dilaton supergravity. The (1+1) dimensional supergravity is generated by the stress-energy of the superparticle, and the evolution of the superparticle is reciprocally influenced by the supergravity.
arxiv +1 more source
Consistent -models in supergravity [PDF]
Nuclear Physics B, 2000 A consistent N=1 supersymmetric $ $-model can be constructed, given a K hler manifold by adding chiral matter multiplets. Their scalar components are covariant tensors on the underlying K hler manifold. The K hler U(1)-charges can be adjusted such that the anomalies cancel, using the holomorphic functions in which the K hler potential transforms ...
J.W. van Holten, S. Groot Nibbelink
openaire +3 more sources