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

Das, Dipankar LU and Saha, Ipsita (2018) In Physical Review D 98(9).
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.

Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
98
issue
9
article number
095010
publisher
American Physical Society
external identifiers
  • scopus:85058069269
ISSN
2470-0010
DOI
10.1103/PhysRevD.98.095010
language
English
LU publication?
yes
id
04209a2d-1956-45cc-8167-757bdbcbccdf
date added to LUP
2018-12-20 10:36:38
date last changed
2019-11-20 05:33:47
@article{04209a2d-1956-45cc-8167-757bdbcbccdf,
  abstract     = {<p>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.</p>},
  author       = {Das, Dipankar and Saha, Ipsita},
  issn         = {2470-0010},
  language     = {eng},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review D},
  title        = {Cornering variants of the Georgi-Machacek model using Higgs precision data},
  url          = {http://dx.doi.org/10.1103/PhysRevD.98.095010},
  doi          = {10.1103/PhysRevD.98.095010},
  volume       = {98},
  year         = {2018},
}