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SUMMARY:Graham White (University of Tokyo)
DTSTART:20220215T213000Z
DTEND:20220215T223000Z
DTSTAMP:20260423T005740Z
UID:nhetc/31
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/nhetc/31/">A
 rchaeology on the origin of matter</a>\nby Graham White (University of Tok
 yo) as part of NHETC Seminar\n\n\nAbstract\nOne of the most convincing rea
 sons to expect physics beyond\nthe Standard model is the inbalance between
  matter and anti-matter. Some\nfantastic paradigms exist that can be probe
 d at a low scale including\nelectroweak baryogenesis\, mesogenesis and res
 onant leptogenesis. While\nthese paradigms or worthy of dedicated attentio
 n\, the elephant in the\nroom is that there are two paradigms that are ver
 y minimal and involve\nphysics at scales we cannot possibly reach with Ear
 th based colliders in\nour life time. I will first discuss the nightmare s
 cenario of thermal\nleptogenesis implemented with no BSM particle content 
 beyond sterile\nneutrinos and an inflaton. In this case\, measurements of 
 the top and\nHiggs mass along with inflationary observables can shed some 
 light on\nthe plausibility\, or lack thereof\, of vanilla leptogenesis. I 
 will then\ndiscuss the GUT leptogenesis and Affleck Dine baryogenesis. I a
 rgue in\nboth these cases there are generic predictions of a primordial\ng
 ravitational wave background that can be measured today. The presence\nof 
 such a signal would lend plausibility to one of these scenarios.\nFinally 
 I discuss  the discriminating power of GWs in discerning the\nsymmetry bre
 aking path through the variable signals of hybrid defects.\n
LOCATION:https://researchseminars.org/talk/nhetc/31/
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