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SUMMARY:Arghyajit Datta (CAU)\, "Revisiting Matter-antimatter asymmetry in
  an Era of Early Matter Domination"
DTSTART:20260408T060000Z
DTEND:20260408T070000Z
DTSTAMP:20260507T054500Z
UID:indico-event-1255@indico.ibs.re.kr
DESCRIPTION:In this talk We will investigate the impact of an early matter
 -dominated (EMD) epoch on the generation of the matter–antimatter asymme
 try. In the first part\, I will show that the modified expansion rate duri
 ng EMD shifts the equilibration temperatures of Standard Model interaction
 s\, including charged-lepton Yukawa processes\, thereby altering the bound
 aries between flavor regimes in the popular leptogenesis mechanism. We the
 n argue that this shift necessitates a re-examination of the conventional 
 flavor-dependent leptogenesis framework\, as both asymmetry production and
  washout are significantly affected.In the second part\, I will illustrate
  the effects where a late-decaying scalar condensate drives an EMD phase. 
 In this setup\, early decays can account for the observed baryon asymmetry
 \, while late-time decays generate a large neutrino asymmetry (predicted b
 y EMPRESS experiment) without overproducing baryons.\n\nhttps://indico.ibs
 .re.kr/event/1255/
LOCATION:CTPU Seminar room (Theory Bldg\, 4F)
URL:https://indico.ibs.re.kr/event/1255/
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