Sterile Neutrino Dark Matter with Supersymmetry

Abstract

Sterile neutrino dark matter, a popular alternative to the WIMP paradigm, has generally been studied in non-supersymmetric setups. If the underlying theory is supersymmetric, we find that several interesting and novel dark matter features can arise. In particular, in scenarios of freeze-in production of sterile neutrino dark matter, its superpartner, the sterile sneutrino, can play a crucial role in early Universe cosmology as the dominant source of cold, warm, or hot dark matter, or of a subdominant relativistic population of sterile neutrinos that can contribute to the effective number of relativistic degrees of freedom Neff during Big Bang nucleosynthesis.

6 pages, 4 figures

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• Cosmology With a Very Light $L_{\mu }-L_{\tau }$ Gauge Boson
• Dark Radiation and Superheavy Dark Matter from Black Hole Domination
• $R(D^{(\ast )})$ from $W^{\prime }$ and right-handed neutrinos
• Warm Decaying Dark Matter and the Hubble Tension
• Right-handed Neutrinos and $R(D^{(\ast )})$
• No H_0 Assistance from Assisted Quintessence
• Simple estimate of BBN sensitivity to light freeze-in dark matter
• Simple Hidden Sector Dark Matter
• Revisiting (s)neutrino dark matter in natural SUSY
• Roles of sterile neutrinos in particle physics and cosmology
• Dark Matter Freeze-In with a Heavy Mediator: Beyond the EFT Approach
• Dark sector production and baryogenesis from not quite black holes
• Dark Photon As an Extra U(1) Extension to the Standard Model With general Rotation in Kinetic Mixing