Reheating and dark matter freeze-in in the Higgs-R2 inflation model

Aoki, Shuntaro; Lee, Hyun Min; Menkara, Adriana G.; Yamashita, Kimiko

doi:10.1007/jhep05(2022)121

Cited by 22 publications

(9 citation statements)

References 76 publications

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“…Since the DM interactions with the SM and inflaton are assumed to be Planck mass suppressed, therefore vector DM is not in thermal equilibrium with the SM bath. We study DM production through its gravitational interactions with the inflaton background field [12,[19][20][21][22][23][24][25][26][27][28][29][30][31] as well as through the annihilation of SM particles, also known as the gravitational freeze-in mechanism [31][32][33][34][35][36][37]. Moreover, DM production through direct inflaton decay is also investigated.…”

Section: Jhep02(2023)196mentioning

confidence: 99%

Higgs boson induced reheating and ultraviolet frozen-in dark matter

Ahmed

Grza̧dkowski

Socha

2023

J. High Energ. Phys.

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A reheating phase in the early universe is an essential part of all inflationary models during which not only the Standard Model (SM) quanta are produced but it can also shed light on the production of dark matter. In this work, we explore a class of reheating models where the reheating is induced by a cubic interaction of the inflaton ϕ to the SM Higgs boson h of the form ghϕMPlϕ|h|2 adopting the α-attractor T-model of inflation. Assuming inflaton as a background field such interaction implies a ϕ-dependent mass term of the Higgs boson and a non-trivial phase-space suppression of the reheating efficiency. As a consequence, the reheating is prolonged and the maximal temperature of the SM thermal bath is reduced. In particular, due to oscillations of the inflaton field the ϕ-dependent Higgs boson mass results in periodic transitions between phases of broken and unbroken electroweak gauge symmetry. The consequences of these rapid phase transitions have been studied in detail. A purely gravitational reheating mechanism in the presence of the inflaton background, i.e., for ghϕ = 0, has also been investigated. It turned out that even though it may account for the total production of SM radiation in the absence of ghϕ, its contribution to the reheating is subdominant for the range of ghϕ considered in this work. Approximate analytical solutions of Boltzmann equations for energy densities of the inflaton and SM radiation have been obtained. As a dark matter candidate a massive Abelian vector boson, Xμ, has been considered. Various production mechanisms of Xμ have been discussed including (i) purely gravitational production from the inflaton background, (ii) gravitational freeze-in from the SM quanta, (iii) inflaton decay through a dim-5 effective operator, and (iv) Higgs portal freeze-in and Higgs decay through a dim-6 effective operator. Parameters that properly describe the observed relic abundance have been determined.

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Section: Jhep02(2023)196mentioning

confidence: 99%

Higgs boson induced reheating and ultraviolet frozen-in dark matter

Ahmed

Grza̧dkowski

Socha

2023

J. High Energ. Phys.

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“…The waterfall transition takes place faster than the Hubble expansion, so preheating is instantaneous. But, if the reheating during the waterfall oscillation is sizable and it is not instantaneous, the number of efoldings required to solve the horizon problem [11,12] is modified to…”

Section: Reheating Completionmentioning

confidence: 99%

Pseudo-Nambu-Goldstone inflation with twin waterfalls

Lee

Menkara

2022

Physics Letters B

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“…If reheating is not instantaneous, the number of efoldings required to solve the horizon problem [14,15] is modified to…”

Section: Reheatingmentioning

confidence: 99%

Pseudo-Nambu-Goldstone inflation with twin waterfalls

Lee,

Menkara

2022

Preprint

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We propose a pseudo-Nambu-Goldstone inflation where twin waterfall fields coupled to the inflaton are responsible for the graceful exit from inflation by a waterfall transition. In this scenario, the Z 2 symmetry for the waterfall fields and the inflaton protects the inflaton potential against dangerous quantum corrections coming from the waterfall couplings. We show that there is a wide range of natural model parameters and initial conditions for a successful inflation and discuss the reheating process by the perturbative decay of the waterfall field with a Z 2 invariant Higgs portal. We also present a microscopic model for the inflaton couplings to the twin waterfall fields in the context of a dark QCD with light and heavy quarks.

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Reheating and dark matter freeze-in in the Higgs-R2 inflation model

Cited by 22 publications

References 76 publications

Higgs boson induced reheating and ultraviolet frozen-in dark matter

Higgs boson induced reheating and ultraviolet frozen-in dark matter

Pseudo-Nambu-Goldstone inflation with twin waterfalls

Pseudo-Nambu-Goldstone inflation with twin waterfalls

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