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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-8980
DTSTART:20241029T190000Z
DTEND:20241029T200000Z
DTSTAMP:20260413T223300Z
LAST-MODIFIED:20241023T115147Z
LOCATION:https://berkeley.zoom.us/j/91230714547
SUMMARY:SIMP Miracles and WIMP Dead Ends: Navigating the Freeze-Out of
  MeV Dark Matter\, Network in Neutrinos\, Nuclear Astrophysics\, and S
 ymmetries (N3AS) Seminar\, Joseph Pradler\, HEPHY\, Vienna
DESCRIPTION:In this talk we consider both the possibility of dark matt
 er being either a strongly or a weakly interacting thermal relic. For 
 strongly interacting massive particles (SIMPs) we study the influence 
 of bound states X on their cosmology\, finding a "catalysis" of mass-d
 epleting processes in the hidden sector\, adding a qualitative change 
 to SIMP freeze-out once X exist\, hence broadening the options for SIM
 P dark matter. In turn\, for weakly interacting massive particles (WIM
 Ps) we study the low mass frontier of thermal relics where freeze-out 
 happens during the cosmological non-trivial epochs of neutrino decoupl
 ing and primordial nucleosynthesis. Here we present a first self-consi
 stent calculation of the cosmological Neff parameter that is expected 
 to be measured with much improved accuracy in upcoming CMB experiments
 .<br>\n <br>\n <br>\nNOTE: All participants and hosts are now required
  to sign into a Zoom account prior to joining meetings hosted by UC Be
 rkeley.<br>\n <br>\nJoin Zoom Meeting:<br>\nhttps://berkeley.zoom.us/j
 /91230714547<br>\n <br>\nMeeting ID: 912 3071 4547
URL:https://www.physics.wisc.edu/events/?id=8980
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