Results 51 to 60 of about 20,674,433 (271)
Higher Order Corrections in Minimal Supergravity Models of Inflation [PDF]
, 2013 We study higher order corrections in new minimal supergravity models of a single scalar field inflation. The gauging in these models leads to a massive vector multiplet and the D-term potential for the inflaton field with a coupling g2 ~ 10−10. In the de-
S. Ferrara +3 more
semanticscholar +1 more source
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
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
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
Primordial black holes as dark matter in supergravity inflation models [PDF]
, 2016 We propose a novel scenario to produce abundant primordial black holes (PBHs) in new inflation which is a second phase of a double inflation in the supergravity framework.
Masahiro Kawasaki +3 more
semanticscholar +1 more source
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
One-loop four-graviton amplitudes in ${\cal N}=4$ supergravity models [PDF]
, 2012 We evaluate with great details one-loop four-graviton field theory amplitudes in pure N=4 D=4 supergravity. The expressions are obtained by taking the field theory limit of (4,0) and (2,2) string theory models. For each model we extract the contributions
Piotr Tourkine, P. Vanhove
semanticscholar +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.
openaire +4 more sources
Impacts of supersymmetric higher derivative terms on inflation models in supergravity [PDF]
, 2015 We show the effects of supersymmetric higher derivative terms on inflation models in supergravity. The results show that such terms generically modify the effective kinetic coefficient of the inflaton during inflation if the cut off scale of the higher ...
Shuntaro Aoki, Y. Yamada
semanticscholar +1 more source