146 citations · 254 across the 4 of their papers we have counts for
4 papers
Density Perturbations in Hybrid Inflation Using a Free Field Theory Time-Delay Approach
Alan H. Guth, Evangelos I. Sfakianakis
We introduce a new method for calculating density perturbations in hybrid inflation which avoids treating the fluctuations of the "waterfall" field as if they were small perturbati…
Analysis of Oscillons in the SU(2) Gauged Higgs Model
Evangelos I. Sfakianakis
A stable oscillon was found in the (classical) analysis of the SU(2) gauged Higgs model under a 2:1 ratio between the Higgs and W masses, both analytically and numerically. We exte…
Multifield Dynamics of Higgs Inflation
Ross N. Greenwood, David I. Kaiser, Evangelos I. Sfakianakis
Higgs inflation is a simple and elegant model in which early-universe inflation is driven by the Higgs sector of the Standard Model. The Higgs sector can support early-universe inf…
Primordial Bispectrum from Multifield Inflation with Nonminimal Couplings
David I. Kaiser, Edward A. Mazenc, Evangelos I. Sfakianakis
Realistic models of high-energy physics include multiple scalar fields. Renormalization requires that the fields have nonminimal couplings to the spacetime Ricci curvature scalar,…