New effects in Dark Matter production

How was dark matter produced in the early Universe? Answering this question is of great importance since it allows us to predict the expected experimental signatures. I will discuss non-perturbative effects in coannihilation driven freeze-out, i.e. Sommerfeld enhancement and bound state formation in a thermal environment, and analyze the connection with phenomenology. In addition, I will comment on the conditions for freeze-out and point out an alternative production mechanism of dark matter which relies on conversion processes instead of annhilations. Interestingly, this mechanism points towards long-lived particles at could be observed at the LHC.  

Best regards,

Andrzej Hryczuk

Kamila Kowalska

Kazuki Sakurai

Enrico Maria Sessolo

Krzysztof Turzyński