Parallel Seesaw Mechanisms for Neutrinos and Freeze-In Long-Lived Dark Matter

Abstract

If dark matter is light, it may be due to a seesaw mechanism just as neutrinos are. It is postulated that both originate from the same type of heavy fermion anchors, either singlets or triplets. In the latter case, a shift of the $W$ mass is predicted, as suggested by the $CDF$ precision measurement. A spontaneously broken dark $U(1)$ gauge symmetry is assumed, resulting in freeze-in long-lived light dark matter.

11 pages, 1 figure, title changed in published version, major text revision

References in corpus (7)

• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• Right-Handed Sneutrino as Cold Dark Matter of the Universe
• W-boson mass in the triplet seesaw model
• The Triplet Dirac Seesaw in the View of the Recent CDF-II W Mass Anomaly
• Theoretical bounds on dark matter masses
• Type III seesaw with R-parity violation in light of $m_W$ (CDF)
• Linkage of Dirac Neutrinos to Dark U(1) Gauge Symmetry