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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-6831
DTSTART:20220204T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T144244Z
LAST-MODIFIED:20220203T152848Z
LOCATION:Chamberlin 5280
SUMMARY:Maximizing Direct Detection with HYPER Dark Matter\, Theory Se
 minar (High Energy/Cosmology)\, Robert Mcgehee\, University of Michiga
 n
DESCRIPTION:In this talk\, we estimate the maximum direct detection cr
 oss section for sub-GeV dark matter scattering off nucleons. For dark 
 matter masses in the range of 10 keV − 100 MeV\, cross sections grea
 ter than 10^(−36) - 10^(−30) cm^2 seem implausible. We introduce a
  dark matter candidate which realizes this maximum cross section: High
 lY interactive ParticlE Relics (HYPERs). After HYPERs freeze-in\, a da
 rk sector phase transition decreases the mass of the mediator which co
 nnects HYPERs to the visible sector. This increases the HYPER’s dire
 ct detection cross section\, but in such a way as to leave the HYPERâ€
 ™s abundance unaffected and avoid conflict with measurements of Big Ba
 ng Nucleosynthesis and the Cosmic Microwave Background. HYPERs present
  a benchmark for direct detection experiments in a parameter space wit
 h few known dark matter models.
URL:https://www.physics.wisc.edu/events/?id=6831
END:VEVENT
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