The fermionic dark matter Higgs portal: an effective field theory approach
The fermionic dark matter Higgs portal: an effective field theory approach
We consider fermionic (Dirac or Majorana) cold thermal relic dark-matter coupling to standard-model particles through the effective dimension-5 Higgs portal operators $$ {\varLambda}^{-1}{\mathcal{O}}_{\mathrm{DM}} \cdot p\ {H}^{\dagger } H $$ , where $$ {\mathcal{O}}_{\mathrm{DM}} $$ is an admixture of scalar $$ \overline{\chi}\chi $$ and pseudoscalar $$ \overline{\chi} i{\gamma}_5\chi $$ DM operators. …