Effective Field Theories for Dark Matter Pairs in the Early Universe

S. Biondini, N. Brambilla, G. Qerimi, A. Vairo

Research output: Contribution to journalArticlepeer-review


In this conference paper, we consider effective field theories of nonrelativistic dark matter particles interacting with a light force mediator in the early expanding universe.We present a general framework, where to account in a systematic way for the relevant processes that may affect the dynamics during thermal freeze-out. In the temperature regime where near-threshold effects, most notably the formation of bound states and Sommerfeld enhancement, have a large impact on the dark matter relic density, we scrutinize possible contributions from higher excited states and radiative corrections in the annihilations and decays of dark matter pairs.

Original languageEnglish
Article numberA10
JournalLetters in High Energy Physics
StatePublished - 2023


  • dark matter
  • potential NREFTs
  • thermal field theory


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