Effective Field Theories for Dark Matter Pairs in the Early Universe

Abstract

In this conference paper, we consider effective field theories of non-relativistic 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.

Discussion about hierarchies of scales improved with respect to the published version in the conference proceedings. 4 pages, 2 figures, conference proceeding of "NuDM-2022"

References in corpus (9)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• Dark-matter bound states from Feynman diagrams
• Non-relativistic bound states at finite temperature (I): the hydrogen atom
• Non-relativistic bound states at finite temperature (II): the muonic hydrogen
• Bound-state effects on dark matter coannihilation: Pushing the boundaries of conversion-driven freeze-out
• Dark Matter bound-state formation at higher order: a non-equilibrium quantum field theory approach
• Non-relativistic and potential non-relativistic effective field theories for scalar mediators
• Bound-state formation, dissociation and decays of darkonium with potential non-relativistic Yukawa theory for scalar and pseudoscalar mediators
• Effective field theories for dark matter pairs in the early universe: cross sections and widths