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SUMMARY:Investigating Leptogenesis in the Era of First-Order Electroweak P
 hase Transition
DTSTART:20250826T070000Z
DTEND:20250826T090000Z
DTSTAMP:20260413T075400Z
UID:indico-event-969@indico.ibs.re.kr
DESCRIPTION:Speakers: Dipendu Bhandari (IIT Guwahati)\n\nWe present a nove
 l approach for implementing baryogenesis via leptogenesis at low scale wit
 hin neutrino seesaw framework where a sufficient lepton asymmetry can be g
 enerated via out of equilibrium CP-violating decays of right handed neutri
 nos (RHNs) even when their mass falls below the Standard Model (SM) Higgs 
 mass. It becomes possible by keeping the sphaleron in equilibrium below it
 s conventional decoupling temperature  GeV in SM so as to facilitate the c
 onversion of lepton asymmetry to baryon asymmetry at such a low scale\, th
 anks to the flexibility of the bubble nucleation temperature in case the e
 lectroweak phase transition (EWPT) is of first order. The scenario emerges
  as an exciting (and perhaps unique) possibility for low scale leptogenesi
 s\, particularly if the Universe attains a reheating temperature lower tha
 n 131.7 GeV. We show that a stochastic gravitational wave\, characteristic
  of such first order EWPT\, may be detected in near future detectors while
  the presence of RHNs of mass as low as 35 GeV opens up  an intriguing de
 tection possibility at current and future accelerator experiments. \n\nht
 tps://indico.ibs.re.kr/event/969/
LOCATION:B447-1 (IBS CTPU-CGA)
URL:https://indico.ibs.re.kr/event/969/
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