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SUMMARY:Jayita Lahiri\, "Topical seminar: High-scale validity of two Higgs
  doublet scenarios with a real scalar singlet dark matter"
DTSTART;VALUE=DATE-TIME:20240617T100000Z
DTEND;VALUE=DATE-TIME:20240617T113000Z
DTSTAMP;VALUE=DATE-TIME:20260411T141150Z
UID:indico-event-7607@indico.ific.uv.es
DESCRIPTION:\nWe study the high-scale validity of two kinds of two Higgs d
 oublet models (2HDM)\, namely\, Type-II and Type-X\, but with a scalar SU(
 2) singlet dark matter (DM) candidate in addition in each case. The additi
 onal quartic couplings involving the DM particle in the scalar potential i
 n both scenarios bring in additional constraints from the requirement of p
 erturbative unitarity and vacuum stability. DM relic density and direct se
 arch constraints play a crucial role in this analysis as the perturbative 
 unitarity of the DM-Higgs portal couplings primarily decides the high-scal
 e validity of the model. We find that\, within the parameter regions thus 
 restricted\, the Type-II scenario must have a cut-off at around  $10^6$ Ge
 V\, while the Type-X scenario admits of validity up to the Planck scale. H
 owever\, only those regions that are valid up to about $10^8$ GeV in Type-
 X 2HDM are amenable to detection at the High-luminosity LHC (up to 3000 $f
 b^{-1}$)\, while most of the parameter space of the Type-II scenario menti
 oned above is likely to be detectable.\n\nhttps://indico.ific.uv.es/event/
 7607/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/7607/
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