GMCALC: a calculator for the Georgi-Machacek model

Abstract

The Georgi-Machacek model adds scalar triplets to the Standard Model Higgs sector in such a way as to preserve custodial SU(2) symmetry in the scalar potential. This allows the triplets to have a non-negligible vacuum expectation value while satisfying constraints from the rho parameter. Depending on the parameters, the 125~GeV neutral Higgs particle can have couplings to WW and ZZ larger than in the Standard Model due to mixing with the triplets. The model also contains singly- and doubly-charged Higgs particles that couple to vector boson pairs at tree level (WZ and like-sign WW, respectively). GMCALC is a self-contained FORTRAN program that, given a set of input parameters, calculates the particle spectrum and tree-level couplings in the Georgi-Machacek model, checks theoretical and indirect constraints, and computes the branching ratios and total widths of the scalars. It also generates a param_card.dat file for MadGraph5 to be used with the corresponding FeynRules model implementation.

20 pages, no figures. Code available at http://people.physics.carleton.ca/~logan/gmcalc/

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Cited by in corpus (6)

• Search for heavy resonances decaying into $WW$ in the $e\nu \mu \nu$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Electroweak phase transition and Higgs phenomenology in the Georgi-Machacek model
• Characterizing a benchmark scenario for heavy Higgs boson searches in the Georgi-Machacek model
• Updated constraints on the Georgi-Machacek model from LHC Run 2
• The hidden side of scalar-triplet models with spontaneous CP violation
• Higgs triplet extension of GRACE