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SUMMARY:HECAP Seminar - Formation of Defects Associated with both Spontane
 ous and Explicit Symmetry Breaking
DTSTART;VALUE=DATE-TIME:20250520T140000Z
DTEND;VALUE=DATE-TIME:20250520T150000Z
DTSTAMP;VALUE=DATE-TIME:20260712T052552Z
UID:indico-event-10984@ictp.it
DESCRIPTION:Abstract: \n\n	We discuss formation of cosmic strings associa
 ted with a spontaneously broken approximate U(1) symmetry by performing c
 lassical field-theoretical simulations. An original U(1) symmetry is expl
 icitly broken down to its subgroup Z_N even before spontaneous breaking t
 akes place. We estimate the ratio of explicit breaking to that of spontane
 ous breaking for which topological defects for N=1 and N=2 are formed. Fo
 r N=1\, a cosmic string attached to a single domain wall can be formed whe
 n the amount of the explicit breaking is 3 orders of magnitude smaller tha
 n that of the spontaneous breaking. For N=2\, no matter how large the expl
 icit breaking is\, domain walls are inevitably formed as long as the tempe
 rature of the Universe is high enough to restore Z_2 symmetry. In that ca
 se\, cosmic strings are also inevitably formed as long as the amount of th
 e explicit breaking is smaller than that of the spontaneous breaking.\n	To
  attend via Zoom:https://zoom.us/j/92441776557\n	Meeting ID:  924 4177 65
 57\n	 \n	Passcode: 175124\n	 \n\n//indico.ictp.it/event/10984/
LOCATION:Hybrid Leonardo Building - Luigi Stasi Seminar Room and via Zoom
URL://indico.ictp.it/event/10984/
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