@Article{Kim_etal2017,
author="Kim, J.
and Ko, P.
and Park, W. I.",
title="Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio",
journal="Journal of Cosmology and Astroparticle Physics",
year="2017",
publisher="Iop Publishing Ltd",
volume="02",
number="2",
pages="003--16pp",
optkeywords="inflation; particle physics -- cosmology connection; physics of the early universe",
abstract="We show that the Higgs portal interactions involving extra dark Higgs field can save generically the original Higgs inflation of the standard model (SM) from the problem of a deep non-SM vacuum in the SM Higgs potential. Specifically, we show that such interactions disconnect the top quark pole mass from inflationary observables and allow multi-dimensional parameter space to save the Higgs inflation, thanks to the additional parameters (the dark Higgs boson mass m(phi), the mixing angle a between the SM Higgs H and dark Higgs Phi, and the mixed quartic coupling) affecting RG-running of the Higgs quartic coupling. The effect of Higgs portal interactions may lead to a larger tensor-to-scalar ratio, 0.08 less than or similar to r less than or similar to 0.1, by adjusting relevant parameters in wide ranges of alpha and m(phi), some region of which can be probed at future colliders. Performing a numerical analysis we find an allowed region of parameters, matching the latest Planck data.",
optnote="WOS:000399455000003",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3080), last updated on Thu, 11 May 2017 16:15:42 +0000",
issn="1475-7516",
doi="10.1088/1475-7516/2017/02/003",
opturl="http://arxiv.org/abs/1405.1635",
opturl="https://doi.org/10.1088/1475-7516/2017/02/003",
archivePrefix="arXiv",
eprint="1405.1635",
language="English"
}