Results 11 to 20 of about 2,978 (222)
Chromo-natural inflation in Supergravity
Physics Letters B, 2018 We present supergravity realizations of chromo-natural inflationary models. We show that by using superpotentials with “imaginary” holomorphic functions of the inflaton one can obtain effective theories of inflation that are also consistent truncations ...
Gianguido Dall'Agata
doaj +4 more sources
Multi-Field versus Single-Field in the Supergravity Models of Inflation and Primordial Black Holes
Universe, 2021 We review the models unifying inflation and Primordial Black Hole (PBH) formation, which are based on the modified (Starobinsky-type) supergravity. We begin with the basic (Starobinsky) inflationary model of modified gravity and its alpha-attractor-type ...
Sergei V. Ketov
doaj +3 more sources
Jacobi-Lie Models and Supergravity Equations
Progress of Theoretical and Experimental Physics, 2023 Poisson-Lie T-duality/plurality was recently generalized to Jacobi-Lie T-plurality formulated in terms of Double Field Theory and based on Leibniz algebras given by structure coefficients $f_{ab}{}^{c},f_{c}{}^{ab},$ and $Z_a,Z^a$.
Hlavatý, Ladislav, Petr, Ivo
core +3 more sources
Cosmological attractor models and higher curvature supergravity [PDF]
Journal of High Energy Physics, 2014 We study cosmological α-attractors in superconformal/supergravity models, where α is related to the geometry of the moduli space. For α = 1 attractors [1] we present a generalization of the previously known manifestly superconformal higher curvature ...
Sérgio Cecotti +2 more
exaly +2 more sources
Minimal Supergravity Models of Inflation [PDF]
Physical Review D, 2013 We present a superconformal master action for a class of supergravity models with one arbitrary function defining the Jordan frame. It leads to a gauge-invariant action for a real vector multiplet, which upon gauge fixing describes a massive vector ...
Ferrara, Sergio +3 more
core +3 more sources
BARYOGENESIS IN SUPERGRAVITY INFLATIONARY MODELS [PDF]
Physics Letters B, 1985 Realistic N=1 supergravity theories with a gravitino mass of order 1 TeV require a period of inflation to dilute the gravitino abundance. Moreover, if the gravitino is unstable the reheat temperature is bounded to be no greater than O(108 GeV).
RUIZALTABA, M +21 more
core +5 more sources
Supersymmetry and supergravity models
Journal of Physics G: Nuclear and Particle Physics, 1998 In this paper a review of the present status of supersymmetric (SUSY) and supergravity (SUGRA) models is presented, emphasizing the ambiguities one encounters in constructing a SUSY or SUGRA version of the standard ...
Ross, GG, Ross, Graham
core +3 more sources
On sgoldstino-less supergravity models of inflation [PDF]
Journal of High Energy Physics, 2014 We go a step further in the search for a consistent and realistic supergravity model of large-field inflation by building a class of models with the following features: during slow-roll, all the scalar fields other than the inflaton are frozen by large ...
Gianguido Dall’Agata +2 more
exaly +2 more sources
R$_{b}$ in supergravity models
, 1995 We compute the supersymmetric contribution to R_{b}\equiv \Gamma (Z\to b{\bar b})/\Gamma (Z\to {\rm hadrons}) in a variety of supergravity models. We find R^{\rm susy}_b\lsim0.0004, which does not shift significantly the Standard Model prediction (R^{\rm
Wang, Xu +2 more
core +3 more sources
Properties of nilpotent supergravity [PDF]
Journal of High Energy Physics, 2015 We construct Supergravity models where the goldstino multiplet has a gravitational origin, being dual to the chiral curvature superfield. Supersymmetry is nonlinearly realized due to a nilpotent constraint, while the goldstino arises from $\gamma$-traces
A Kehagias, A Sagnotti, Ferrara S
exaly +2 more sources