Observable effects of general new scalar particles

  • J. de BlasEmail author
  • M. Chala
  • M. Pérez-Victoria
  • J. Santiago
Open Access
Regular Article - Theoretical Physics


We classify all possible new scalar particles that can have renormalizable linear couplings to Standard Model fields and therefore be singly produced at colliders. We show that this classification exhausts the list of heavy scalar particles that contribute at the tree level to the Standard Model effective Lagrangian to dimension six. We compute this effective Lagrangian for a general scenario with an arbitrary number of new scalar particles and obtain flavor-preserving constraints on their couplings and masses. This completes the tree-level matching of the coefficients of dimension five and six operators in the effective Lagrangian to arbitrary extensions of the Standard Model.


Beyond Standard Model Phenomenological Models 


Open Access

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  • J. de Blas
    • 1
    Email author
  • M. Chala
    • 2
  • M. Pérez-Victoria
    • 3
  • J. Santiago
    • 3
    • 4
  1. 1.INFN, Sezione di RomaRomeItaly
  2. 2.DESYHamburgGermany
  3. 3.Departamento de Física Teórica y del Cosmos and CAFPEUniversidad de Granada, Campus de FuentenuevaGranadaSpain
  4. 4.Theory Division, CERNGeneva 23Switzerland

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