Small-scale cosmology “crisis" and self-interacting right-handed neutrino warm dark matter

Nick E. Mavromatos*

*Corresponding author for this work

Research output: Contribution to journalConference paperpeer-review

Abstract

In the lecture, I first review the basic problems of the ΛCDM model at small (galactic) scales, also known as “small-scale Cosmology crisis”, namely discrepancies between theoretical simulations and observations. I then argue how systems of right-handed neutrinos (RHN) with masses of order 50 keV in the galaxies can tackle these problems, provided appropriately strong RHN self-interactions are included. Such models may constitute interesting minimal extensions of the Standard Model. Combining galactic phenomenology with other astroparticle physics considerations of such models, one arrives at a narrow range 47 keVc−2 ≤ m ≤ 50 keVc−2 for the allowed mass m of RHN, thereby pointing towards the rôle of such particles as interesteding warm dark matter components.

Original languageEnglish
Article number01001
JournalEPJ Web of Conferences
Volume182
DOIs
Publication statusPublished - 3 Aug 2018
Event6th International Conference on New Frontiers in Physics, ICNFP 2017 - Crete, Greece
Duration: 17 Aug 201729 Aug 2017

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