BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Florian Niedermann (Nordita/KTH/SU) - From Cosmic Tensions to Fund
 amental Physics: A New Phase Transition in the Early Universe
DTSTART:20260325T140000Z
DTEND:20260325T150000Z
DTSTAMP:20260407T170500Z
UID:indico-event-2118@indico.uu.se
DESCRIPTION:Speakers: Florian Niedermann (Nordita/KTH/SU)\n\nOur cosmologi
 cal standard model provides a remarkably successful description of the Uni
 verse\, yet it treats the dark sector\, including dark matter and dark ene
 rgy\, as a set of fluid components rather than a fundamental theory. There
 fore\, it is perhaps not surprising that with more precise cosmological da
 ta\, this description appears increasingly incomplete. In this talk\, I wi
 ll argue that these observational challenges point towards new dark-sector
  physics\, built on the same fundamental principles that govern the visibl
 e sector. Specifically\, I will present a scenario in which the dark secto
 r undergoes a symmetry-breaking phase transition in the early Universe\, l
 eading to a rapid reheating of the dark sector after Big Bang nucleosynthe
 sis. In this scenario\, a gauge force between dark matter and dark radiati
 on gives rise to dark acoustic oscillations close in scale to baryon acous
 tic oscillations. This distinct feature produces a falsifiable signature i
 n the matter power spectrum and provides a new way of addressing a recent 
 anomaly in large-scale structure data\, different from evolving dark energ
 y.\n\nhttps://indico.uu.se/event/2118/
LOCATION:92110 (Ångströmlaboratoriet)
URL:https://indico.uu.se/event/2118/
END:VEVENT
END:VCALENDAR