Eur. Phys. J. C (2017) 77: 675
https://doi.org/10.1140/epjc/s10052-017-5226-6

Regular Article - Theoretical Physics

Probing -violating Higgs and gauge-boson couplings in the Standard Model effective field theory

¹ Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH, UK
² Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, João Pessoa, Paraíba, 58051-970, Brazil
³ Sorbonne Universités, Université Pierre et Marie Curie (Paris 06), UMR 7589, LPTHE, 75005, Paris, France
⁴ CNRS, UMR 7589, LPTHE, 75005, Paris, France
⁵ Institut Universitaire de France, 103 boulevard Saint-Michel, 75005, Paris, France
⁶ Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, Avenue des Martyrs 53, 38026, Grenoble, France
⁷ Department of Physics and Astronomy, Michigan State University, East Lansing, USA

^* e-mail: fuks@lpthe.jussieu.fr

Received: 28 April 2017
Accepted: 16 September 2017
Published online: 12 October 2017

Abstract

We study the phenomenological consequences of several CP-violating structures that could arise in the Standard Model effective field theory framework. Focusing on operators involving electroweak gauge and/or Higgs bosons, we derive constraints originating from Run I LHC data. We then study the capabilities of the present and future LHC runs at higher energies to further probe associated CP-violating phenomena and we demonstrate how differential information can play a key role. We consider both traditional four-lepton probes of CP-violation in the Higgs sector and novel new physics handles based on varied angular and non-angular observables.