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SUMMARY:Crunching Dilaton\, Hidden Naturalness
DTSTART:20201019T140000
DTEND:20201019T153000
DTSTAMP:20260407T064727Z
UID:1ee5a3250caa17a70ed9fbf7280cc43ad2ddaa08ba4a154e1d7c6605
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Michael Geller (Tel Aviv University)\nWe introduce a new
  approach to the Higgs naturalness problem\, where the value of the Higgs 
 mass is tied to cosmic stability and the possibility of a large observable
  Universe. The Higgs mixes with the dilaton of a CFT sector whose true gro
 und state has a large negative vacuum energy. If the Higgs VEV is non-zero
  and below O(TeV)\, the CFT also admits a second metastable vacuum\, where
  the expansion history of the Universe is conventional. As a result\, only
  Hubble patches with unnaturally small values of the Higgs mass support in
 flation and post-inflationary expansion\, while all other patches rapidly 
 crunch. The elementary Higgs VEV driving the dilaton potential is the esse
 nce of our new solution to the hierarchy problem. The main experimental pr
 ediction is a light dilaton field in the 0.1-10 GeV range that mixes with 
 the Higgs. Part of the viable parameter space has already been probed by m
 easurements of rare B-meson decays\, and the rest will be fully explored b
 y future colliders and experiments searching for light\, weakly-coupled pa
 rticles.\n\nRecordings will be available at: https://mediaspace.epfl.ch/c
 hannel/High+Energy+Theory+Seminars/32518
LOCATION:Zoom https://epfl.zoom.us/j/86952059135
STATUS:CONFIRMED
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