Higgs boson induced reheating and ultraviolet frozen-in dark matter

Ahmed, Aqeel; Grza̧dkowski, Bohdan; Socha, Anna

doi:10.1007/jhep02(2023)196

Cited by 20 publications

(12 citation statements)

References 55 publications

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“…Neglecting L non−G int , the authors of refs. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] have studied the gravitational freeze-in DM production via inflaton annihilation φφ → h µν → χχ, either with the minimal or non-minimal coupling…”

Section: Introductionmentioning

confidence: 99%

Gravitational freeze-in dark matter from Higgs preheating

Zhang

Zheng

2023

J. Cosmol. Astropart. Phys.

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Gravitational freeze-in is a mechanism to explain the observed dark matter relic density if dark matter neither couples to inflation nor to standard model sector. In this work we study gravitational freeze-in dark matter production during Higgs preheating based on non-perturbative resonance. Using reliable lattice method to handle this process, we show that tachyonic resonance is prohibited by strong back reaction due to Higgs self interaction needed to keep the positivity of potential during preheating, and parameter resonance is viable by tuning the Higgs self-interaction coupling to be small enough in ultraviolet energy scale. We then derive the dark matter relic density under the context of Higgs preheating, and uncover a new dark matter parameter space with dark matter mass larger than inflaton mass, which arises from out-of-equilibrium Higgs annihilation. Finally, we briefly remark the open question of testing gravitational dark matter.

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Section: Introductionmentioning

confidence: 99%

Gravitational freeze-in dark matter from Higgs preheating

Zhang

Zheng

2023

J. Cosmol. Astropart. Phys.

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“…In the first half of our present paper, we will discuss in detail the single-sector reheating, which has been studied earlier for some special cases [25,26,71,[89][90][91]. However, we will perform a comprehensive study on this with many significantly new results.…”

Section: Perturbative Reheating: General Set Upmentioning

confidence: 94%

WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆Neff

Haque,

Maity,

Mondal

2023

J. High Energ. Phys.

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In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology. We studied the reheating through various possible channels of inflaton going into massless scalars (bosonic reheating) and fermions (fermionic reheating) via non-gravitational and gravity-mediated decay processes. We further include the finite temperature effect on the decay process. Along with their precise roles in governing the dynamics, we compared the relative importance of different temperature-corrected decay channels in the gradual process of reheating depending on the reheating equation of state (EoS), which is directly related to inflaton potential. Particularly, the universal gravitational decay of inflaton is observed to play a very crucial role in the reheating process for a large range of inflaton decay parameters. For our study, we consider typical α-attractor inflationary models. We further establish the intriguing connection among those different inflaton decay channels and the CMB power spectrum that can have profound implications in building up a unified model of inflation, reheating, and DM. We analyze both fermion and scalar DM with different physical processes being involved, such as gravitational scattering, thermal bath scattering, and direct inflaton decay. Gravitational decay can again be observed to play a crucial role in setting the maximum limit on DM mass, especially in the FIMP scenario, which has already been observed earlier in the literature [52]. Depending on the coupling strength, we have analyzed in detail the production of both FIMP and WIMP-like DM during reheating and their detailed phenomenological implications from the perspective of various cosmological and laboratory experiments.

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“…In particular, in this study, we investigate scenarios of bosonic and fermionic reheating, where the inflaton decays dominant into pairs of bosons or fermions. Such cosmological histories have been recently considered in the context of DM freeze-in with (non-)renormalizable operators [20,21,[32][33][34][35][36][37], WIMPs [38], in the singlet-scalar DM model [39], CMB constraints on DM production [40][41][42][43], and freeze-in Baryogenesis [44].…”

Section: Jcap01(2024)053mentioning

confidence: 99%

Confronting dark matter freeze-in during reheating with constraints from inflation

Becker,

Copello,

Harz

et al. 2024

J. Cosmol. Astropart. Phys.

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We investigate the production of particle Dark Matter (DM) in a minimal freeze-in model considering a non-instantaneous reheating phase after inflation. We demonstrate that for low reheating temperatures, bosonic or fermionic reheating from monomial potentials can lead to a different evolution in the DM production and hence to distinct predictions for the parent particle lifetime and mass, constrained by long-lived particle (LLP) searches. We highlight that such scenario predicts parent particle decay lengths larger compared to using the instantaneous reheating approximation. Moreover, we demonstrate the importance of an accurate definition of the reheating temperature and emphasize its relevance for the correct interpretation of experimental constraints. We explore different models of inflation, which can lead to the considered reheating potential. We find that the extent to which the standard DM freeze-in production can be modified crucially depends on the underlying inflationary model. Based on the latest CMB constraints, we derive lower limits on the decay length of the parent particle and confront these results with the corresponding reach of LLP searches. Our findings underscore the impact of the specific dynamics of inflation on DM freeze-in production and highlight their importance for the interpretation of collider signatures. At the same time, our results indicate the potential for LLP searches to shed light on the underlying dynamics of reheating.

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Higgs boson induced reheating and ultraviolet frozen-in dark matter

Cited by 20 publications

References 55 publications

Gravitational freeze-in dark matter from Higgs preheating

Gravitational freeze-in dark matter from Higgs preheating

WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆Neff

Confronting dark matter freeze-in during reheating with constraints from inflation

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