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SUMMARY:The Gegenbauer Higgs
DTSTART:20221031T140000
DTEND:20221031T150000
DTSTAMP:20260406T230036Z
UID:d2155b0229a6cbb234640af8693a8fd8641b4ea7c388035674797a5b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Gauthier Durieux\nHiggs precision measurements and resonance s
 earches at the LHC have made sharper than ever the electroweak naturalness
  problem. Instead of abandoning symmetry-based explanations\, we explore f
 urther the range of theoretical possibilities\, to distinguish structural 
 limitations from the consequences of minimality assumptions. In scenarios 
 where the Higgs boson is the pion of a new strong sector\, we consider rad
 iatively stable potentials generated by symmetry-breaking spurions in non-
 minimal multi-index irreducible representations. They naturally lead to sm
 all Higgs vacuum expectation values and therefore relax the fine-tuning re
 quired to comply with Higgs coupling measurements. Twin-Higgs realisations
  also alleviate the tension arising from the separation between the Higgs 
 and coloured top partner masses. Single-Higgs coupling deviations of a few
  percent and trilinear self-coupling deviations of order one are irreducib
 le in the natural parameter space. More generally\, a ratio between these 
 coupling modifications spanning two orders of magnitude is structurally al
 lowed and also realised in a simple custodial weak-quadruplet extension of
  the standard model.
LOCATION:BSP 727 https://epfl.zoom.us/j/67529935509
STATUS:CONFIRMED
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