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DTSTART;TZID=Europe/Rome:20241009T143000
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DTSTAMP:20260514T165549
CREATED:20240725T111744Z
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UID:38291-1728484200-1728493200@w3.lnf.infn.it
SUMMARY:Dark Matter: from freeze-in to gravitational production
DESCRIPTION:Speaker: Davide Racco (U. Zurich and ETH Zurich) \nVarious production mechanisms for dark matter complement the well-motivated option of freeze-out. The freeze-in scenario is viable for very weakly-coupled particles\, which can be looked for in terrestrial experiments. I will discuss how this mechanism is cosmologically viable with respect to the curvature perturbations that it produces on large scales. Another minimal and unavoidable production mechanism for any dark sector is gravitational production during inflation. Its abundance today is determined by the evolution of the dark sector and its interactions during the early Universe. I will discuss as a prototypical example a model of dark QED with a massive mediator\, showing how the preferred parameter space complements the one predicted from freeze-in. \nFinally\, I will comment on the misalignment production mechanism for scalars like the axion\, and the possible isocurvature constraints for that scenario. \n  \nJoin Zoom Meeting\nhttps://infn-it.zoom.us/j/97845970382?pwd=jwCWjzdWOEvy1mjYH4csZqwD4Ful4x.1 \nMeeting ID: 978 4597 0382\nPasscode: 511907
URL:/event/dark-matter-from-freeze-in-to-gravitational-production/
LOCATION:Aula Salvini
CATEGORIES:Seminari generali
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