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SUMMARY:Impact of primordial plasma on the collapse of bubble walls and pr
 imordial black hole formation
DTSTART;VALUE=DATE-TIME:20261029T073000Z
DTEND;VALUE=DATE-TIME:20261029T074500Z
DTSTAMP;VALUE=DATE-TIME:20261106T051419Z
UID:indico-contribution-6527@cern.ch
DESCRIPTION:Speakers: Danila Filippov (NRNU MEPhI)\nThe interaction of a c
 losed domain wall with the primordial plasma during the radiation-dominate
 d stage of the Universe is studied. When the plasma temperature drops belo
 w a threshold value determined by the wall potential parameters\, the wall
  becomes opaque\, trapping plasma inside. Relativistic hydrodynamic simula
 tions of the trapped plasma and the wall dynamics are performed. The crite
 rion for the wall to remain spherical during collapse is established\, jus
 tifying the use of the thin-wall equation of motion. The pressure of the t
 rapped plasma is shown to counteract the surface tension and\, for a certa
 in range of parameters\, to prevent the collapse into a primordial black h
 ole\, causing the wall to bounce and launch a shock wave into the surround
 ing plasma. The propagation distance of this shock wave and the associated
  heating of the external medium are estimated.\n\nhttps://indico.particle.
 mephi.ru/event/626/contributions/6527/
LOCATION: Conference Hall 5
URL:https://indico.particle.mephi.ru/event/626/contributions/6527/
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