Freeze-in and Freeze-out in a Right-Handed Neutrino Extended MSSM with a Seesaw Mechanism

Abstract

We investigate the possibility of saturating the relic density bound with light Higgsinos. When the minimal supersymmetric Standard Model is extended with right-handed neutrino superfields and the seesaw scale is very low, right-handed sneutrinos can be produced via the freeze-in mechanism. In such a case we can have essentially two independent sources for dark matter, the traditional freeze-out of Higgsinos and the freeze-in of right-handed sneutrinos. The heavier of these two will decay to the lighter species with a delay. We rule out such a scenario for all seesaw models as the lifetime of sterile neutrinos produced over-abundantly via Dodelson-Widrow mechanism exceeds the age of the universe and will contribute to the relic density.

13 pages, 6 figures, 1 table; v2 updated title, minor textual and grammatical changes to match published version

References in corpus (13)

• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Sterile neutrino search at NEOS Experiment
• Sterile Neutrinos
• Dark Matter Search Results from 4.2 Tonne-Years of Exposure of the LUX-ZEPLIN (LZ) Experiment
• On the most constraining cosmological neutrino mass bounds
• Dark Matter Search Results from 1.54 Tonne$\cdot$Year Exposure of PandaX-4T
• Right-Handed Sneutrino as Cold Dark Matter of the Universe
• Search for long-lived charginos based on a disappearing-track signature using 136 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for sterile neutrino oscillation using RENO and NEOS data
• WIMP Dark Matter Search using a 3.1 Tonne-Year Exposure of the XENONnT Experiment
• Final Search for Short-Baseline Neutrino Oscillations with the PROSPECT-I Detector at HFIR
• Enhancing Direct Detection of Higgsino Dark Matter