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PRODID:UW-Madison-Physics-Events
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SEQUENCE:2
UID:UW-Physics-Event-4629
DTSTART:20170926T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260313T135713Z
LAST-MODIFIED:20171120T162933Z
LOCATION:5280 Chamberlin
SUMMARY:Weak gravity conjecture\, Multiple point principle and standar
 d model landscape\, Theory Seminar (High Energy/Cosmology)\, Yuta Hama
 da\, University of Wisconsin-Madison & KEK Theory Center
DESCRIPTION:The requirement for an ultraviolet completable theory to b
 e well-behaved upon compacti cation has been suggested as a guiding pr
 inciple for distinguishing the landscape from the swampland. Motivated
  by the weak gravity conjecture and the multiple point principle\, we 
 investigate the vacuum structure of the standard model compacti ed on 
 S^1 and T^2. The measured value of the Higgs mass implies\, in additio
 n to the electroweak vacuum\, the existence of a new vacuum where the 
 Higgs eld value is around the Planck scale. We explore two- and three-
 dimensional critical points of the moduli potential arising from compa
 cti cations of the electroweak vacuum as well as this high scale vacuu
 m\, in the presence of Majorana/Dirac neutrinos and/or axions. We poin
 t out potential sources of instability for these lower dimensional cri
 tical points in the standard model landscape. We also point out that a
  high scale AdS_4 vacuum of the Standard Model\, if exists\, would be 
 at odd with the conjecture that all non-supersymmetric AdS vacua are u
 nstable. We argue that\, if we require a degeneracy between three- and
  four-dimensional vacua as suggested by the multiple point principle\,
  the neutrinos are predicted to be Dirac\, with the mass of the lighte
 st neutrino  O(1-10) meV\, which may be tested by future CMB\, large 
 scale structure and 21cm line observations.
URL:https://www.physics.wisc.edu/events/?id=4629
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