Baryon asymmetry from dark matter decay

Borah, Debasish; Das, Suruj Jyoti; Roshan, Rishav

doi:10.1103/physrevd.108.075025

Phys. Rev. D

2023

DOI: 10.1103/physrevd.108.075025

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Baryon asymmetry from dark matter decay

Debasish Borah,

Suruj Jyoti Das,

Rishav Roshan

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2024

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Asymmetric self-interacting dark matter with a canonical seesaw model

Borah,

Mahapatra,

Paul

et al. 2024

Phys. Rev. D

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We study the possibility of generating dark matter (DM) and baryon asymmetry of the Universe (BAU) simultaneously in an asymmetric DM framework, which also alleviates the small-scale structure issues of cold DM. While the thermal relic of such self-interacting DM remains underabundant due to efficient annihilation into light mediators, a nonzero asymmetry in the dark sector can lead to the survival of the required DM in the Universe. The existence of a light mediator leads to the required self-interactions of DM at small scales while keeping DM properties similar to cold DM at large scales. It also ensures that the symmetric DM component annihilates away, leaving the asymmetric part in the spirit of cogenesis. The particle physics implementation is done in canonical seesaw models of light neutrino mass, connecting it to the origin of DM and BAU. In particular, we consider type-I and type-III seesaw origin of neutrino mass for simplicity and minimality of the field content. We show that the desired self-interactions and relic of DM together with BAU while satisfying relevant constraints lead to strict limits on DM mass O(GeV)≲MDM≲460 GeV. In spite of being a high-scale seesaw, the models remain verifiable in different experiments, including direct and indirect DM searches as well as colliders. Published by the American Physical Society 2024

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Asymmetric self-interacting dark matter with a canonical seesaw model

Borah,

Mahapatra,

Paul

et al. 2024

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

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Baryon asymmetry from dark matter decay

Cited by 1 publication

References 73 publications

Asymmetric self-interacting dark matter with a canonical seesaw model

Asymmetric self-interacting dark matter with a canonical seesaw model

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