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SUMMARY:Topical Seminar: Scalar Field Dynamics and Dark Matter Production 
 in Supercooled Phase Transitions
DTSTART;VALUE=DATE-TIME:20251204T110000Z
DTEND;VALUE=DATE-TIME:20251204T123000Z
DTSTAMP;VALUE=DATE-TIME:20261014T201407Z
UID:indico-event-8266@indico.ific.uv.es
DESCRIPTION:Supercooled first-order phase transitions can reshape the ther
 mal history of the universe. If the scalar field driving the transition is
  weakly coupled\, an era of scalar field domination may follow. Using latt
 ice simulations\, I will show that the post-transition equation of state c
 an deviate significantly from the commonly assumed matter domination. Our 
 results indicate that the equation of state depends on how relativistic th
 e bubble collisions are\, with bigger bubble separations leading to more r
 elativistic walls and to a more radiation-like expansion. \n\nThese dynam
 ics have direct implications on particle production and gravitational wave
 s. In the second part of this talk\, I will introduce the phase-in scenari
 o\, as a concrete application. In this setup\, we study the impact of a su
 percooled phase transition on dark matter (DM) production via UV-freeze-in
 . In the phase-in regime\, the DM abundance becomes insensitive to the reh
 eating temperature\, and instead depends on the details of the transition.
  \n\nhttps://indico.ific.uv.es/event/8266/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/8266/
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