Regular Article - Theoretical Physics
Testing anomalous couplings and Higgs self-couplings via double and triple Higgs production at colliders
Departamento de Física Teórica, Universidad Autónoma de Madrid, 28049, Cantoblanco, Madrid, Spain
2 Instituto de Física Teórica (UAM/CSIC), Universidad Autónoma de Madrid, 28049, Cantoblanco, Madrid, Spain
3 Institut de Física d’Altes Energies (IFAE) and Departament de Física, Universitat Autònoma de Barcelona (UAB), 08193, Bellaterra, Barcelona, Spain
Accepted: 11 March 2021
Published online: 26 March 2021
In the present work we study the implications at the future colliders of the modified interaction vertices WWH, WWHH, HHH and HHHH within the context of the non-linear effective field theory given by the Electroweak Chiral Lagrangian. These vertices are given by four parameters, a, b, and , respectively, that are independent and without any constraint from symmetry considerations in this non-linear effective Lagrangian context, given the fact the Higgs field is a singlet. This is in contrast to the Standard Model, where the vertices are related by and , with GeV. We investigate the implications of the absence of these relations in the Electroweak Chiral Lagrangian case. We explore the sensitivity to these Higgs anomalous couplings in the two main channels at these colliders: double and triple Higgs production (plus neutrinos). Concretely, we study the access to a and b in and the access to and in . Our study of the beyond the Standard Model couplings via triple Higgs boson production at colliders is novel and shows for the first time the possible accessibility to the quartic Higgs self-coupling.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3