Co-scattering in micrOMEGAs: A case study for the singlet-triplet dark  matter model

Alguero, Gaël; Bélanger, G.; Kraml, S.; Pukhov, A.

doi:10.21468/scipostphys.13.6.124

Cited by 10 publications

(4 citation statements)

References 48 publications

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“…In this case the density of DM can be obtained by solving the set of Boltzmann equations for the densities of different particles in the dark sector, e.g. using available numerical solvers like micrOMEGAs [111][112][113] that can work with multi-component DM models [114]. If the processes of DM scattering on the SM plasma particles are not very efficient, the kinetic decoupling can occur before the freeze-out.…”

Section: Jhep02(2024)207mentioning

confidence: 99%

Phase transitions and gravitational waves in a model of ℤ3 scalar dark matter

Benincasa,

Hryczuk,

Kannike

et al. 2024

J. High Energ. Phys.

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Theories with more than one scalar field often exhibit phase transitions producing potentially detectable gravitational wave (GW) signal. In this work we study the semi-annihilating ℤ3 dark matter model, whose dark sector comprises an inert doublet and a complex singlet, and assess its prospects in future GW detectors. Without imposing limits from requirement of providing a viable dark matter candidate, i.e. taking into account only other experimental and theoretical constraints, we find that the first order phase transition in this model can be strong enough to lead to a detectable signal. However, direct detection and the dark matter thermal relic density constraint calculated with the state-of-the-art method including the impact of early kinetic decoupling, very strongly limit the parameter space of the model explaining all of dark matter and providing observable GW peak amplitude. Extending the analysis to underabundant dark matter thus reveals region with detectable GWs from a single-step or multi-step phase transition.

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Section: Jhep02(2024)207mentioning

confidence: 99%

Phase transitions and gravitational waves in a model of ℤ3 scalar dark matter

Benincasa,

Hryczuk,

Kannike

et al. 2024

J. High Energ. Phys.

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“…To estimate the relevance of the different kinds of processes -annihilations, semiannihilations, and conversions -that contribute to the relic density of φ 1 , it is convenient to use a function in micrOMEGAs that allows to omit a set of processes from the relic density calculation. For example, ExcludedFor2DM="2211" will remove all conversion processes involving pairs of φ 2 and φ 1 [65]. In particular in the following section we will compare for each component the relic density obtained from including all processes (Ω i ) with the ones taking into account only processes involving DM pair annihilation into SM particles (Ω i ).…”

Section: Jhep03(2023)100mentioning

confidence: 99%

The Z7 model of three-component scalar dark matter

Bélanger

Pukhov

Yaguna

et al. 2023

J. High Energ. Phys.

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We investigate, for the first time, a scenario where the dark matter consists of three complex scalar fields that are stabilized by a single Z7 symmetry. As an extension of the well-known scalar Higgs-portal, this Z7 model is also subject to important restrictions arising from the relic density constraint and from direct detection experiments. Our goal in this paper is to find and characterize the viable regions of this model, and to analyze its detection prospects in future experiments. First, the processes that affect the relic densities are identified (they include semiannihilations and conversions) and then incorporated into the Boltzmann equations for the dark matter abundances, which are numerically solved with micrOMEGAs. By means of random scans of the parameter space, the regions consistent with current data, including the recent direct detection limit from the LZ experiment, are selected. Our results reveal that the Z7 model is indeed viable over a wide range of dark matter masses and that both conversions and semiannihilations play an important role in determining the relic densities. Remarkably, we find that in many cases all three of the dark matter particles give rise to observable signals in future direct detection experiments, providing a suitable way to test this scenario.

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“…In this case the density of DM can be obtained by solving the set of Boltzmann equations for the densities of different particles in the dark sector, e.g. using available numerical solvers like micrOMEGAs [108][109][110] that can work with multi-component DM models [111]. If the processes of DM scattering on the SM plasma particles are not very efficient, the kinetic decoupling can occur before the freezeout.…”

Section: Relic Densitymentioning

confidence: 99%

Phase transitions and gravitational waves in models of $\mathbb{Z_N}$ scalar dark matter

Benincasa¹,

Kannike²,

Hektor³

et al. 2020

Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019)

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Theories with more than one scalar field often exhibit phase transitions producing potentially detectable gravitational wave (GW) signal. In this work we study the semi-annihilating Z 3 dark matter model, whose dark sector comprises an inert doublet and a complex singlet, and assess its prospects in future GW detectors. Without imposing limits from requirement of providing a viable dark matter candidate, i.e. taking into account only other experimental and theoretical constraints, we find that the first order phase transition in this model can be strong enough to lead to a detectable signal. However, direct detection and the dark matter thermal relic density constraint calculated with the state-of-the-art method including the impact of early kinetic decoupling, very strongly limit the parameter space of the model explaining all of dark matter and providing observable GW peak amplitude. Extending the analysis to underabundant dark matter thus reveals region with detectable GWs from a single-step or multi-step phase transition.

show abstract

Co-scattering in micrOMEGAs: A case study for the singlet-triplet dark matter model

Cited by 10 publications

References 48 publications

Phase transitions and gravitational waves in a model of ℤ3 scalar dark matter

Phase transitions and gravitational waves in a model of ℤ3 scalar dark matter

The Z7 model of three-component scalar dark matter

Phase transitions and gravitational waves in models of $\mathbb{Z_N}$ scalar dark matter

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