Unitarity constraints on general scalar couplings with SARAH

Unitarity constraints on general scalar couplings with SARAH

Abstract 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...

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Main Authors: Mark D. Goodsell, Florian Staub
Format: Article
Language:English
Published: SpringerOpen 2018-08-01
Series:European Physical Journal C: Particles and Fields
Online Access:http://link.springer.com/article/10.1140/epjc/s10052-018-6127-z
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spelling doaj-56337a04101e4e82be8362012a82c98a2020-11-25T01:32:44ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-08-0178811410.1140/epjc/s10052-018-6127-zUnitarity constraints on general scalar couplings with SARAHMark D. Goodsell0Florian Staub1Laboratoire de Physique Théorique et Hautes Energies (LPTHE), UMR 7589, Sorbonne Université et CNRSInstitute for Theoretical Physics (ITP), Karlsruhe Institute of TechnologyAbstract 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.http://link.springer.com/article/10.1140/epjc/s10052-018-6127-z
collection DOAJ
language English
format Article
sources DOAJ
author Mark D. Goodsell
Florian Staub
spellingShingle Mark D. Goodsell
Florian Staub
Unitarity constraints on general scalar couplings with SARAH
European Physical Journal C: Particles and Fields
author_facet Mark D. Goodsell
Florian Staub
author_sort Mark D. Goodsell
title Unitarity constraints on general scalar couplings with SARAH
title_short 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_sort unitarity constraints on general scalar couplings with sarah
publisher SpringerOpen
series European Physical Journal C: Particles and Fields
issn 1434-6044
1434-6052
publishDate 2018-08-01
description Abstract 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.
url http://link.springer.com/article/10.1140/epjc/s10052-018-6127-z
work_keys_str_mv AT markdgoodsell unitarityconstraintsongeneralscalarcouplingswithsarah
AT florianstaub unitarityconstraintsongeneralscalarcouplingswithsarah
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