Abstract
We propose a model where a long-lived pseudoscalar EeV particle can be produced with sufficient abundance so as to account for the cold dark matter density, despite having a Planck mass suppressed coupling to the thermal bath. Connecting this state to a hidden sterile neutrino sector through derivative couplings, induced by higher dimensional operators, allows one to account for light neutrino masses while having a lifetime that can be much larger than the age of the Universe. Moreover, the same derivative coupling accounts for the production of dark matter in the very first instant of the reheating. Given the sensitivity of the IceCube and ANITA collaborations, we study the possible signatures of such a model in the form of Ultra-High-Energy Cosmic Rays in the neutrino sector, and show that such signals could be detected in the near future.
Highlights
Despite many efforts, the presence of dark matter (DM) in the Universe [1] has not yet been confirmed by any direct [2,3,4] or indirect [5,6,7,8,9] detection signal
Given the sensitivity of the IceCube and ANITA collaborations, we study the possible signatures of such a model in the form of ultrahigh-energy cosmic rays in the neutrino sector, and show that such signals could be detected in the near future
It is natural to open up the possible mass range for new searches for dark matter
Summary
The presence of dark matter (DM) in the Universe [1] has not yet been confirmed by any direct [2,3,4] or indirect [5,6,7,8,9] detection signal. It would seem that Planck-suppressed couplings of DM particles to Standard Model (SM) states could be sufficient for explaining why dark matter may be long lived on cosmological time scales. From indirect gamma [53] positron [54] or neutrino [55] detection (τ 1⁄4 Γ−1 ≳ 1029 seconds) one would require m ≲ 10 keV which reaches the limit from Lyman-α or structure formation constraints [56] It is, not an easy task to produce the requisite abundance of DM particles with such feeble couplings. We show that by combining the violation of global continuous symmetries at the Planck scale, while coupling DM to the neutrino sector, one can generate a large DM lifetime τ.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
