Higgs-Inflaton Mixing and Vacuum Stability

Yohei  Ema; Mindaugas Karciauskas; Oleg Lebedev; Stanislav Rusak; Marco Zatta

doi:10.1016/j.physletb.2018.10.074

Higgs-Inflaton Mixing and Vacuum Stability

Yohei Ema, Mindaugas Karciauskas, Oleg Lebedev, Stanislav Rusak, Marco Zatta

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Sammanfattning

The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings between the Higgs and an inflaton in quantum field theory. We find that the often omitted trilinear interaction is only weakly constrained by cosmology and could stabilize the electroweak vacuum by increasing the Higgs self coupling. The consequent Higgs-inflaton mixing can be as large as order one making a direct inflaton search possible at the LHC. (C) 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.

Originalspråk	engelska
Tidskrift	Physics Letters B
Volym	789
Sidor (från-till)	373-377
Antal sidor	5
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2018.10.074
Status	Publicerad - 10 feb 2019
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

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114 Fysik

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10.1016/j.physletb.2018.10.074Licens: CC BY

1-s2.0-S0370269318309730-mainSlutlig publicerad version, 427 KBLicens: CC BY

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AU - Ema, Yohei

AU - Karciauskas, Mindaugas

AU - Lebedev, Oleg

AU - Rusak, Stanislav

AU - Zatta, Marco

PY - 2019/2/10

Y1 - 2019/2/10

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AB - The quartic and trilinear Higgs field couplings to an additional real scalar are renormalizable, gauge and Lorentz invariant. Thus, on general grounds, one expects such couplings between the Higgs and an inflaton in quantum field theory. We find that the often omitted trilinear interaction is only weakly constrained by cosmology and could stabilize the electroweak vacuum by increasing the Higgs self coupling. The consequent Higgs-inflaton mixing can be as large as order one making a direct inflaton search possible at the LHC. (C) 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.

KW - 114 Physical sciences

KW - Higgs, inlation

KW - STANDARD MODEL

KW - BOSON

U2 - 10.1016/j.physletb.2018.10.074

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EP - 377

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

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