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Title: Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio

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 {sub φ}, the mixing angle α between the SM Higgs H and dark Higgs Φ, 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 ∼< r ∼< 0.1, by adjusting relevant parameters in wide ranges of α and m {sub φ}, 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.

Authors:
;  [1];  [2]
  1. Quantum Universe Center, Korea Institute for Advanced Study, 85 Hoegiro Dongdaemungu, Seoul 02455 (Korea, Republic of)
  2. Departament de Física Teòrica and IFIC, Universitat de València-CSIC, E-46100, Burjassot (Spain)
Publication Date:
OSTI Identifier:
22680050
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COUPLING; HIGGS BOSONS; HIGGS MODEL; INFLATIONARY UNIVERSE; INTERACTIONS; MASS; MIXING ANGLE; NUMERICAL ANALYSIS; SPACE; STANDARD MODEL; T QUARKS

Citation Formats

Kim, Jinsu, Ko, Pyungwon, and Park, Wan-Il, E-mail: kimjinsu@kias.re.kr, E-mail: pko@kias.re.kr, E-mail: Wanil.Park@uv.es. Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/02/003.
Kim, Jinsu, Ko, Pyungwon, & Park, Wan-Il, E-mail: kimjinsu@kias.re.kr, E-mail: pko@kias.re.kr, E-mail: Wanil.Park@uv.es. Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio. United States. doi:10.1088/1475-7516/2017/02/003.
Kim, Jinsu, Ko, Pyungwon, and Park, Wan-Il, E-mail: kimjinsu@kias.re.kr, E-mail: pko@kias.re.kr, E-mail: Wanil.Park@uv.es. Wed . "Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio". United States. doi:10.1088/1475-7516/2017/02/003.
@article{osti_22680050,
title = {Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio},
author = {Kim, Jinsu and Ko, Pyungwon and Park, Wan-Il, E-mail: kimjinsu@kias.re.kr, E-mail: pko@kias.re.kr, E-mail: Wanil.Park@uv.es},
abstractNote = {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 {sub φ}, the mixing angle α between the SM Higgs H and dark Higgs Φ, 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 ∼< r ∼< 0.1, by adjusting relevant parameters in wide ranges of α and m {sub φ}, 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.},
doi = {10.1088/1475-7516/2017/02/003},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 02,
volume = 2017,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}