期刊
EUROPEAN PHYSICAL JOURNAL C
卷 78, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-018-6127-z
关键词
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资金
- ERC Recognition Award of the Helmholtz Association [ERC-RA-0008]
- Agence Nationale de Recherche Grant [ANR-15-CE31-0002]
- Labex Institut Lagrange de Paris [ANR-11-IDEX-0004-02, ANR-10-LABX-63]
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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