Cornering variants of the Georgi-Machacek model using Higgs precision data

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Abstract

We show that in the absence of trilinear terms in the scalar potential of the Georgi-Machacek model, heavy charged scalars do not necessarily decouple from the h→γγ decay amplitude. In such scenarios, measurement of the Higgs to diphoton signal strength can place stringent constraints in the parameter space. Using the projected precisions at the High Luminosity LHC (HL-LHC) and the ILC, we find that the upper bound on the triplet vacuum expectation value can be as low as 10 GeV. We also found that when combined with the theoretical constraints from perturbative unitarity and stability, such variants may be ruled out altogether.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Calcutta
  • Istituto Nazionale di Fisica Nucleare
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik
Originalspråkengelska
Artikelnummer095010
TidskriftPhysical Review D
Volym98
Utgivningsnummer9
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa