BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Topical seminar: "Cosmological gravitational particle production a
 nd implications for dark matter phenomenology"
DTSTART;VALUE=DATE-TIME:20260515T090000Z
DTEND;VALUE=DATE-TIME:20260515T100000Z
DTSTAMP;VALUE=DATE-TIME:20260429T182514Z
UID:indico-event-8592@indico.ific.uv.es
DESCRIPTION:\nParticle production in the Early Universe is one of the corn
 erstones of modern cosmology and plays an important role in dark matter ph
 enomenology. In this talk\, I will first discuss the gravitational product
 ion of scalars during inflation. I will compare Bogolyubov coefficient and
  Starobinsky stochastic approaches\, showing that they only agree in the l
 imit of infinitely long inflation. High-scale inflation is very efficient 
 in particle production\, leading to constraints on the existence of free\,
  light\, and stable scalars: such particles are viable only if their masse
 s are below the eV scale or if the reheating temperature is in the GeV ran
 ge. These constraints motivate scenarios in which dark matter is produced 
 via low-temperature freeze-in. In this framework\, I will consider warm Hi
 ggs portal dark matter. In scenarios where the Standard Model thermal bath
  never reaches high temperatures\, dark matter production can be suppresse
 d. This allows for a significant dark matter-Higgs coupling\, enabling war
 m dark matter detection via Higgs decay at colliders. I will further discu
 ss the strong Lyman-α bound on the dark matter mass\, excluding masses be
 low 50-100 keV\, and show how the shape of the warm dark matter momentum d
 istribution is highly non-thermal and not captured by the commonly used α
 βγ-parametrization.\n\n\nhttps://indico.ific.uv.es/event/8592/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/8592/
END:VEVENT
END:VCALENDAR