Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Boveia, A.; Chen, Thomas Y.; Doglioni, C.; Drlica-Wagner, A.; Gori, Stefania; Lippincott, W. Hugh; Monzani, M. E.; Prescod-Weinstein, Chanda; Shakya, Bibhushan; Slatyer, Tracy R.; Toro, Natalia; Williams, M.; Winslow, L. A.; Tañedo, Philip; Tsai, Y. T.; Yu, J.; Yu, Tien-Tien

doi:10.48550/arxiv.2210.01770

Cited by 2 publications

(3 citation statements)

References 73 publications

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“…As the DM mass is lowered, however, the interaction rate needs to increase to compensate for the smaller DM energy density, such that it becomes easier to violate the freeze-in assumptions at low reheating temperatures. For example, for m DM = 12 keV, corresponding to the lower mass bound on FIMP DM from Lyman-α constraints [10,55], 5 DM equilibrates if m P = 500 GeV and T rh = 10 GeV. In the results presented in the following sections, we checked that the parameter space presented fulfills the freeze-in conditions.…”

Section: Jcap01(2024)053mentioning

confidence: 99%

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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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Section: Jcap01(2024)053mentioning

confidence: 99%

“…While various possibilities for accommodating scenarios of WIMP DM may still be viable, in the last decade, there has been a growing interest in alternative production mechanisms (see, e.g., refs. [4][5][6] for recent reviews).…”

Section: Introductionmentioning

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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“…refs. [23,24], puts growing pressure on the thermal DM paradigm and motivates further research on non-thermal production mechanisms. These could explain the observed DM abundance while avoiding the aforementioned bounds due to much-suppressed couplings between the dark and SM species, for reviews see refs.…”

Section: Introductionmentioning

confidence: 99%

Dark matter production through a non-thermal flavon portal

Cheek

Osiński

Roszkowski

et al. 2023

J. High Energ. Phys.

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The Froggatt-Nielsen (FN) mechanism provides an attractive way of generating the determined fermion mass hierarchy and quark mixing matrix elements in the Standard Model (SM). Here we extend it by coupling the FN field, the flavon, to a dark sector containing one or more dark matter particles which are produced non-thermally sequentially through flavon production. Non-thermal flavon production occurs efficiently via freeze-in and through field oscillations. We explore this in the regime of high-scale breaking Λ of the global U(1)FN group and at the reheating temperature TR ≪ Λ where the flavon remains out of equilibrium at all times. We identify phenomenologically acceptable regions of TR and the flavon mass where the relic abundance of dark matter and other cosmological constraints are satisfied. In the case of one-component dark matter we find an effective upper limit on the FN charges at high Λ, i.e. $$ {Q}_{\textrm{FN}}^{\textrm{DM}}\le 13 $$ Q FN DM ≤ 13 . In the multi-component dark sector scenario the dark matter can be the heaviest dark particle that can be effectively stable at cosmological timescales, alternatively it can be produced sequentially by decays of the heavier ones. For scenarios where dark decays occur at intermediate timescales, i.e. t ~ 0.1 − 1028 s, we find that existing searches can effectively probe interesting regions of parameter space. These searches include indirect probes on decays such as γ-ray and neutrino telescopes as well as analyses of the Cosmic Microwave Background, as well as constraints on small scale structure formation from the Lyman-α forest. We comment on the future prospects of such probes, place projected sensitivities, and discuss how this scenario could accommodate the cosmological S8 tension.

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Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Cited by 2 publications

References 73 publications

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

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

Dark matter production through a non-thermal flavon portal

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