Obikhod T, Petrenko E. Three models, MSSM, 2HDM, NMSSM, for supersymmetry searches at the LHC. Sci Herald Uzhhorod Univ Ser Phys. 2024;(56):2792-2797. DOI: 10.54919/physics/56.2024.279tg2
Three models, MSSM, 2HDM, NMSSM, for supersymmetry searches at the LHC
Tetiana Obikhod, Evgen Petrenko
https://doi.org/10.54919/physics/56.2024.279tg2
Abstract
Relevance. Supersymmetry is a theory that provides an elegant solution to Standard Model problems related to the interaction hierarchy, dark matter candidates, and corrections to the Higgs boson mass. Searching for supersymmetric particles is a key focus of the LHC, exploring various decay modes and potential links to recent ATLAS and CMS observations.
Purpose. The purpose of the study is to use modern software to select the optimal theory for the predictions of the manifestations of supersymmetry in the LHC experiment.
Methodology. A complex methodology was used for the analysis and synthesis of relevant experimental and theoretical material, computer modeling and a comparative-analytical research method.
Results. The research results are summarized in three tables, each corresponding to MSSM, 2HDM, and NMSSM models, with relevant scenarios. For supersymmetry searches, two parameter spaces were defined: scenario 1 without experimental constraints and scenario 2 based on experimental data. Analysis of the Higgs boson production cross-sections through gluon-gluon and bottom-quark interactions showed that the NMSSM model is optimal, yielding the highest cross-section for the lightest CP-even Higgs in gluon fusion. The MSSM model had the largest cross-section for CP-odd Higgs production. No significant changes were observed in CP-odd Higgs production for 2HDM across scenarios 1 and 2. The cross-sections in gluon fusion, especially for the NMSSM model, align with experimental data presented the greatest value for the production of the lightest and CP-even Higgs bosons, MSSM model yields the best results for the lightest and CP-odd Higgs bosons in the second scenario.
Conclusions. For the search for superparticles, both theoretical models, in this case, this is the NMSSM model, and the parameter space of the considered models are of significant importance. At the same time, it is necessary to note the growth of the cross section for all models with increasing energy at the collider LHC.
Keywords: supersymmetry; gluon-gluon fusion; parameters of model; production cross sections; Higgs boson
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