NLO electroweak corrections in general scalar singlet models

  • Raul Costa
  • Marco O. P. Sampaio
  • Rui Santos
Open Access
Regular Article - Theoretical Physics


If no new physics signals are found, in the coming years, at the Large Hadron Collider Run-2, an increase in precision of the Higgs couplings measurements will shift the discussion to the effects of higher order corrections. In Beyond the Standard Model (BSM) theories this may become the only tool to probe new physics. Extensions of the Standard Model (SM) with several scalar singlets may address several of its problems, namely to explain dark matter, the matter-antimatter asymmetry, or to improve the stability of the SM up to the Planck scale. In this work we propose a general framework to calculate one loop-corrections to the propagators and to the scalar field vacuum expectation values of BSM models with an arbitrary number of scalar singlets. We then apply our method to a real and to a complex scalar singlet models. We assess the importance of the one-loop radiative corrections first by computing them for a tree level mixing sum constraint, and then for the main Higgs production process ggH. We conclude that, for the currently allowed parameter space of these models, the corrections can be at most a few percent. Notably, a non-zero correction can survive when dark matter is present, in the SM-like limit of the Higgs couplings to other SM particles.


Beyond Standard Model Higgs Physics Spontaneous Symmetry Breaking 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Copyright information

© The Author(s) 2017

Authors and Affiliations

  • Raul Costa
    • 1
    • 2
  • Marco O. P. Sampaio
    • 2
  • Rui Santos
    • 3
    • 4
    • 5
  1. 1.CERNGenevaSwitzerland
  2. 2.Departamento de Física da Universidade de Aveiro and CIDMA (Center for Research & Development in Mathematics and Applications)AveiroPortugal
  3. 3.Instituto Superior de Engenharia de Lisboa — ISELLisboaPortugal
  4. 4.Centro de Física Teórica e ComputacionalUniversidade de LisboaLisboaPortugal
  5. 5.LIP, Departamento de FísicaUniversidade do MinhoBragaPortugal

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