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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3332
DTSTART:20140506T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260313T141645Z
LAST-MODIFIED:20140505T205157Z
LOCATION:5280 Chamberlin Hall
SUMMARY:The Double-Dark Portal\, Theory Seminar (High Energy/Cosmology
 )\, David Curtin\, Stony Brook University
DESCRIPTION:In most models of the dark sector\, dark matter is charged
  under some new symmetry to make it stable. We explore the possibility
  that not just dark matter\, but also the force carrier connecting it 
 to the visible sector is charged under this symmetry. This dark mediat
 or then acts as a Double-Dark Portal.  We realize this setup in the da
 rk mediator Dark matter model (dmDM)\, featuring a fermionic DM candid
 ate chi with Yukawa couplings to light scalars phi. The scalars couple
  to SM quarks via the operator q q phi phi /Lambda. This can lead to l
 arge direct detection signals via the 2->3 process chi N -> chi N phi 
 if one of the scalars has mass < 10 keV. We undertake the first system
 atic survey of constraints on light scalars coupled to the SM via the 
 above operator\, including LHC experiments\, cosmological consideratio
 ns and stellar astrophysics\, and find the strongest constraints come 
 from neutron star cooling observations. We also explore the direct det
 ection consequences of this scenario and find that a heavy ~ 100 GeV d
 mDM candidate fakes different ~ 10 GeV WIMPs at different experiments.
URL:https://www.physics.wisc.edu/events/?id=3332
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