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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-6644
DTSTART:20210928T210000Z
DTEND:20210928T220000Z
DTSTAMP:20260414T190843Z
LAST-MODIFIED:20210926T213754Z
LOCATION:Chamberlin 5280
SUMMARY:SU(4) Flavorful Portal Matter\, Theory Seminar (High Energy/Co
 smology)\, George Wojcik\, University of Wisconsin-Madison
DESCRIPTION:Dark Matter (DM) and its potential interactions with the S
 tandard Model (SM) continue to present a rich framework for model buil
 ding. In the case of thermal DM of a mass between a few MeV and a few 
 GeV\, a compelling and much-explored framework is that of a dark photo
 n/vector portal\, which posits a new U(1) ``dark photon" which only co
 uples to the SM via small kinetic mixing (KM) with the SM hypercharge.
  This mixing can be mediated at the one-loop level by portal matter (P
 M) fields which are charged under both the dark U(1) and the SM gauge 
 group. Models with appropriate portal matter content to produce finite
  and calculable kinetic mixing can arise from non-minimal dark sectors
 \, in which the dark U(1) is a subgroup of a larger gauge symmetry und
 er which SM particles might have non-trivial representations. In this 
 talk\, I will describe a model in which the dark U(1) is unified with 
 another popular extension to the SM gauge group\, a local SU(3) flavor
  symmetry. The full dark/flavor symmetry group is SU(4)×U(1)\, incorp
 orating the local SU(3) flavor symmetry with PM appearing as a vector-
 like "fourth generation"  to supplement the three generations of the S
 M. I then discuss the phenomenology of the new extended dark gauge gro
 up at experimentally accessible energies\, including non-trivial conse
 quences of the flavor symmetry being unified with the dark sector. Not
 e: This is a hybrid event. A zoom link will be distributed via the sem
 inar mailing list. To join\, email the organizer.
URL:https://www.physics.wisc.edu/events/?id=6644
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