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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-8979
DTSTART:20251205T213000Z
DTEND:20251205T223000Z
DTSTAMP:20260413T083911Z
LAST-MODIFIED:20251202T150732Z
LOCATION:Chamberlin 2241
SUMMARY:An Axion Odyssey\, Physics Department Colloquium\, Andrew Long
 \, Rice University
DESCRIPTION:The Standard Model of the Elementary Particles stands as t
 he crowning achievement of 20th century particle physics.  It has been
  unerringly successful at describing the properties and interactions o
 f the known elementary particles and forces\, and with the triumphant 
 discovery of the Higgs boson in 2012\, the Standard Model is finally â
 €ścomplete.”  This is not to say that the Standard Model is without 
 a few loose threads\, which theorists love to tug on in hopes that som
 ething will unravel.  Why\, for example\, is the neutron’s electric 
 dipole moment observed to be so much smaller than the theory of the st
 rong nuclear force would allow?  Moreover\, astrophysical and cosmolog
 ical observations have furnished overwhelming evidence for the existen
 ce of natural phenomena that cannot be described by the Standard Model
 .  For example\, what is the nature of the mysterious dark matter?  In
  this presentation I’ll describe the physics of a hypothetical parti
 cle called the axion\, which was first proposed to explain the neutron
 ’s tiny electric dipole moment\, but which has found its way into ma
 ny aspects of particle cosmology:  from dark matter and baryogenesis t
 o inflation and string theory.  I will survey several astrophysical\, 
 cosmological\, and terrestrial probes of axion-like particles and disc
 uss what new mysteries are waiting to be revealed.  
URL:https://www.physics.wisc.edu/events/?id=8979
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