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SEQUENCE:1
UID:UW-Physics-Event-6274
DTSTART:20210205T200000Z
DTEND:20210205T210000Z
DTSTAMP:20260415T003604Z
LAST-MODIFIED:20210203T171808Z
LOCATION:For zoom link\, sign up at: https://groups.google.com/a/g-gro
 ups.wisc.edu/d/forum/theoryseminars/join
SUMMARY:Phenomenological and Quantum Gravity constraints from Charged 
 Black Hole Evaporation in de Sitter Space\, Theory Seminar (High Energ
 y/Cosmology)\, Gerben Venken\, Heidelberg University
DESCRIPTION:In this talk\, I will discuss the decay of charged black h
 oles in de
\nSitter space. We will establish how black hole mass and c
 harge change
\nover time due to both Hawking radiation and Schwinger p
 air production
\nas a function of the masses and charges of the elemen
 tary particles in
\nthe theory.
\nBy demanding that black holes decay 
 'sensibly'\, one can constrain the
\nspectrum of allowed particles in 
 a theory in an interesting way. This
\nfits into the larger picture of
  the Swampland program of constraining
\neffective field theories by d
 emanding they can be completed into
\nconsistent quantum gravity theor
 ies.
\nWe will find a lower bound on the mass of charged particles by

 \ndemanding that large charged black holes evaporate back to empty de

 \nSitter space\, in accordance with the thermal picture of the de Sitt
 er
\nstatic patch. This bound is satisfied by the charged spectrum of 
 the
\nStandard Model. This bound has phenomenological implications for
  the
\ncosmological hierarchy problem and inflation. The bound has a n
 ice
\ninterplay with other constraints obtained in the swampland progr
 am.
\nThe bound can be applied to argue against the consistency of cer
 tain
\nde Sitter supergravity models.
\nThere has been much discussion
  about the consistency of de Sitter
\nvacua in string theory and quant
 um gravity. Interestingly\, proposed
\nstring theory constructions of 
 de Sitter vacua involving uplifting
\nwarped throats such as KKLT and 
 LVS seem at present to satisfy both
\nour bound and the weak gravity c
 onjecture.
URL:https://www.physics.wisc.edu/events/?id=6274
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