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GMCALC: a calculator for the Georgi-Machacek model

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arxiv 1412.7387 v1 pith:TO5A6NQA submitted 2014-12-23 hep-ph hep-ex

Katy Hartling , Kunal Kumar , Heather E. Logan This is my paper
classification hep-phhep-ex
keywords modelgeorgi-machacekhiggstripletsconstraintscouplingsgmcalcparameters
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Fermionic decay of light charged pseudoscalar in Georgi Machacek model

    hep-ph 2025-06 conditional novelty 4.0 of 10

    Combining the cs and tau-nu charged-Higgs channels from ATLAS and CMS, the author obtains a tighter upper limit on the triplet vev v2 for GM-model pseudoscalar masses below 160 GeV than the earlier b→sγ constraint.

  2. BSM: Extended Scalar Sectors

    hep-ph 2025-07 unverdicted novelty 1.0 of 10

    An updated review chapter on extended scalar sectors, their constraints, dark matter and CP violation links, and future collider searches.

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