Co-annihilating dark matter: Effective operator analysis and collider phenomenology
Co-annihilating dark matter: Effective operator analysis and collider phenomenology
We study dark matter (DM) models in which there are two dark sector particles, $\chi_1$ and $\chi_2$, of near mass. In such models, co-annihilation of $\chi_1$ and $\chi_2$ may be the dominant process controlling the DM relic density during freezeout in the early universe. In this scenario, there is no …