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VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Pitt PACC Meeting: Maira Dutra
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260719T214123Z
UID:tag:localist.com\,2008:EventInstance_38332421674659
DTSTART:20211117T210000Z
DTEND:20211117T220000Z
DESCRIPTION:Testable portal models of FIMP dark matter\n \n\nDark matter pa
 rticles can interact so weakly with the standard model fields that they ma
 y never have reached thermal equilibrium in the early universe. The relic 
 density of such feebly interacting massive  particles (FIMPs) is produced 
 via the so-called freeze-in mechanism. This possibility can explain why we
  have not yet detected dark matter but is also appealing from a theoretica
 l perspective since tiny couplings might be a consequence of heavy particl
 es needed to solve different puzzles in particle physics. In this talk\, I
  will present two testable models of FIMP dark matter. The first model is 
 a neutrino portal where three right-handed heavy neutrinos participate in 
 the type-I seesaw mechanism while mediating interactions between the visib
 le and dark sectors. If a sufficiently long early matter-dominated period 
 occurred during the freeze-in process\, FIMP self-annihilation becomes tes
 table by indirect detection experiments. The second model is a Z' portal i
 n which the SM fermions and a fermionic dark matter candidate are both cha
 rged under a new U(1) symmetry. Remarkably\, the rich phenomenology of Z' 
 bosons is currently constraining regions of the Z' \nparameter space in wh
 ich the dark matter relic density is achieved via freeze-in.\n\nZoom ID: 9
 7113126809\nhttps://pitt.zoom.us/j/97113126809\n\nDepartment members\, see
  email for password.\n\nNon-department members\, contact paugrad@pitt.edu 
 for access or to be added to the weekly newsletter.
LOCATION:321 Allen Hall
SUMMARY:Pitt PACC Meeting: Maira Dutra
URL;VALUE=URI:https://calendar.pitt.edu/event/pitt_pacc_meeting_maira_dutra
CATEGORIES:Lectures\, Symposia\, Etc.
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