Twin sterile neutrino dark matter

Holst, Ian; Hopper, Dan; Krnjaic, Gordan; Song, Deheng

doi:10.1103/physrevd.109.063514

Title: Twin sterile neutrino dark matter

Journal Article · 08 March 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.109.063514 · OSTI ID:2320296

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University of Chicago, IL (United States); University of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
University of Chicago, IL (United States); University of Chicago, IL (United States). Kavli Institute for Cosmological Physics (KICP); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA (United States); Kyoto University (Japan)

We propose that the dark matter of our Universe could be sterile neutrinos which reside within the twin sector of a mirror twin Higgs model. In our scenario, these particles are produced through a version of the Dodelson-Widrow mechanism that takes place entirely within the twin sector, yielding a dark matter candidate that is consistent with x-ray and gamma-ray line constraints. Furthermore, this scenario can naturally avoid the cosmological problems that are typically encountered in mirror twin Higgs models. In particular, if the sterile neutrinos in the Standard Model sector decay out of equilibrium, they can heat the Standard Model bath and reduce the contributions of the twin particles to N_eff. Such decays also reduce the effective temperature of the dark matter, thereby relaxing constraints from large-scale structure. The sterile neutrinos included in this model are compatible with the seesaw mechanism for generating Standard Model neutrino masses.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); Grants-in-Aid for Scientific Research (KAKENHI); Universities Research Association

Grant/Contract Number:: AC02-07CH11359; SC0020262; 20H05852

OSTI ID:: 2320296

Alternate ID(s):: OSTI ID: 1983785

Report Number(s):: FERMILAB-PUB-22-913-T; arXiv:2305.06364; oai:inspirehep.net:2658914

Journal Information:: Physical Review. D., Vol. 109, Issue 6; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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