Gravitational vector Dark Matter

A new dark sector consisting of a pure non-abelian gauge theory has no renormalizable interaction with SM particles, and can thereby realise gravitational Dark Matter (DM). Gauge interactions confine at a scale Lambda (DM) giving bound states with typical lifetimes tau similar to MP14/Lambda DM5 that can be DM candidates if Lambda (DM) is below 100 TeV. Furthermore, accidental symmetries of group-theoretical nature produce special gravitationally stable bound states. In the presence of generic Planck-suppressed operators such states become long-lived: SU(N) gauge theories contain bound states with tau similar to MP18/Lambda DM9; even longer lifetimes tau = (M-Pl/Lambda (DM))(2N-4)/Lambda (DM) arise from SO(N) theories with N >= 8, and possibly from F-4 or E-8. We compute their relic abundance generated by gravitational freeze-in and by inflationary fluctuations, finding that they can be viable DM candidates for Lambda (DM) greater than or similar to 10(10) GeV.

Automated summary

A new dark sector consisting of a pure non-abelian gauge theory can potentially serve as gravitational dark matter candidates through bound states with long lifetimes, especially when accidental symmetries of group-theoretical nature are present. These bound states can be viable dark matter candidates for certain energy scales greater than or similar to 10^10 GeV.