Unitarity constraints on general scalar couplings with SARAH

We present an update of the Mathematica package SARAH to calculate unitarity constraints in BSM models. The new functions can perform an analytical and numerical calculation of the two-particle scattering matrix of (uncoloured) scalars. We do not make use of the simplifying assumption of a very larg...

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Detalles Bibliográficos
Autores principales: Goodsell, Mark D., Staub, Florian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2018
Materias:
Special Article - Tools for Experiment and Theory
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6191078/
https://www.ncbi.nlm.nih.gov/pubmed/30839762
http://dx.doi.org/10.1140/epjc/s10052-018-6127-z
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author Goodsell, Mark D.
Staub, Florian
author_facet Goodsell, Mark D.
Staub, Florian
author_sort Goodsell, Mark D.
collection PubMed
description We present an update of the Mathematica package SARAH to calculate unitarity constraints in BSM models. The new functions can perform an analytical and numerical calculation of the two-particle scattering matrix of (uncoloured) scalars. We do not make use of the simplifying assumption of a very large scattering energy, but include all contributions which could become important at small energies above the weak scale. This allows us to constrain trilinear scalar couplings. However, it can also modify (weakening or strengthening) the constraints on quartic couplings, which we show via the example of a singlet extended Standard Model.
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spelling pubmed-61910782018-10-31 Unitarity constraints on general scalar couplings with SARAH Goodsell, Mark D. Staub, Florian Eur Phys J C Part Fields Special Article - Tools for Experiment and Theory We present an update of the Mathematica package SARAH to calculate unitarity constraints in BSM models. The new functions can perform an analytical and numerical calculation of the two-particle scattering matrix of (uncoloured) scalars. We do not make use of the simplifying assumption of a very large scattering energy, but include all contributions which could become important at small energies above the weak scale. This allows us to constrain trilinear scalar couplings. However, it can also modify (weakening or strengthening) the constraints on quartic couplings, which we show via the example of a singlet extended Standard Model. Springer Berlin Heidelberg 2018-08-14 2018 /pmc/articles/PMC6191078/ /pubmed/30839762 http://dx.doi.org/10.1140/epjc/s10052-018-6127-z Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Special Article - Tools for Experiment and Theory
Goodsell, Mark D.
Staub, Florian
Unitarity constraints on general scalar couplings with SARAH
title Unitarity constraints on general scalar couplings with SARAH
title_full Unitarity constraints on general scalar couplings with SARAH
title_fullStr Unitarity constraints on general scalar couplings with SARAH
title_full_unstemmed Unitarity constraints on general scalar couplings with SARAH
title_short Unitarity constraints on general scalar couplings with SARAH
title_sort unitarity constraints on general scalar couplings with sarah
topic Special Article - Tools for Experiment and Theory
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6191078/
https://www.ncbi.nlm.nih.gov/pubmed/30839762
http://dx.doi.org/10.1140/epjc/s10052-018-6127-z
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