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Roman Pasechnik

Senior lecturer

Typical working day..

All one-loop scalar vertices in the effective potential approach

Author

  • José Eliel Camargo-Molina
  • António P. Morais
  • Roman Pasechnik
  • Marco O P Sampaio
  • Jonas Wessén

Summary, in English

Using the one-loop Coleman-Weinberg effective potential, we derive a general analytic expression for all the derivatives of the effective potential with respect to any number of classical scalar fields. The result is valid for a renormalisable theory in four dimensions with any number of scalars, fermions or gauge bosons. This result corresponds to the zero-external momentum contribution to a general one-loop diagram with N scalar external legs. We illustrate the use of the general result in two simple scalar singlet extensions of the Standard Model, to obtain the dominant contributions to the triple couplings of light scalar particles under the zero external momentum approximation.

Department/s

  • Department of Astronomy and Theoretical Physics

Publishing year

2016-08-01

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2016

Issue

8

Document type

Journal article

Publisher

Springer

Topic

  • Other Physics Topics

Keywords

  • Beyond Standard Model
  • Higgs Physics
  • Spontaneous Symmetry Breaking

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479