400 citations · 7k across the 150 of their papers we have counts for
12 papers · 1 filter
Comments on the Starobinsky Model of Inflation and its Descendants
Alex Kehagias, Azadeh Moradinezhad Dizgah, Antonio Riotto
We point out that the ability of some models of inflation, such as Higgs inflation and the universal attractor models, in reproducing the available data is due to their relation to…
Equal-time Consistency Relations in the Large-Scale Structure of the Universe
Alex Kehagias, Hideki Perrier, Antonio Riotto
We discuss the consistency relations involving the soft limit of the (n + 1)-correlator functions of dark matter at equal times and their consequences for the halo model.
Consequences of Symmetries and Consistency Relations in the Large-Scale Structure of the Universe for Non-local bias and Modified Gravity
Alexandros Kehagias, Jorge Noreña, Hideki Perrier +1
Consistency relations involving the soft limit of the (n + 1)-correlator functions of dark matter and galaxy overdensities can be obtained, both in real and redshift space, thanks…
Vacuum structure in a chiral R+R^n modification of pure supergravity
Sergio Ferrara, Alex Kehagias, Massimo Porrati
We discuss an class of modified , D=4 supergravity models where the deformation is a monomial in the chiral scalar curvature m…
Conformal Symmetries of FRW Accelerating Cosmologies
A. Kehagias, A. Riotto
We show that any accelerating Friedmann-Robertson-Walker (FRW) cosmology with equation of state w < -1/3 (and therefore not only a de Sitter stage with w =-1) exhibits three-dimens…
Supersymmetry Breaking by Higher Dimension Operators
Fotis Farakos, Sergio Ferrara, Alex Kehagias +1
We discuss a supersymmetry breaking mechanism for N = 1 theories triggered by higher dimensional op- erators. We consider such operators for real linear and chiral spinor superfiel…