R. Gröber
Higgs pair production at NLO QCD for CP-violating Higgs sectors
Gröber, R.; Mühlleitner, M.; Spira, M.
Authors
M. Mühlleitner
M. Spira
Abstract
Higgs pair production through gluon fusion is an important process at the LHC to test the dynamics underlying electroweak symmetry breaking. Higgs sectors beyond the Standard Model (SM) can substantially modify this cross section through novel couplings not present in the SM or the on-shell production of new heavy Higgs bosons that subsequently decay into Higgs pairs. CP violation in the Higgs sector is important for the explanation of the observed matter-antimatter asymmetry through electroweak baryogenesis. In this work we compute the next-to-leading order (NLO) QCD corrections in the heavy top quark limit, including the effects of CP violation in the Higgs sector. We choose the effective theory (EFT) approach, which provides a rather model-independent way to explore New Physics (NP) effects by adding dimension-6 operators, both CP-conserving and CP-violating ones, to the SM Lagrangian. Furthermore, we perform the computation within a specific UV-complete model and choose as benchmark model the general 2-Higgs-Doublet Model with CP violation, the C2HDM. Depending on the dimension-6 coefficients, the relative NLO QCD corrections are affected by several per cent through the new CP-violating operators. This is also the case for SM-like Higgs pair production in the C2HDM, while the relative QCD corrections in the production of heavier C2HDM Higgs boson pairs deviate more strongly from the SM case. The absolute cross sections both in the EFT and the C2HDM can be modified by more than an order of magnitude. In particular, in the C2HDM the resonant production of Higgs pairs can by far exceed the SM cross section.
Citation
Gröber, R., Mühlleitner, M., & Spira, M. (2017). Higgs pair production at NLO QCD for CP-violating Higgs sectors. Nuclear Physics B, 925, 1-27. https://doi.org/10.1016/j.nuclphysb.2017.10.002
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 2, 2017 |
Online Publication Date | Oct 4, 2017 |
Publication Date | Oct 4, 2017 |
Deposit Date | Jan 3, 2018 |
Publicly Available Date | Jan 3, 2018 |
Journal | Nuclear Physics B |
Print ISSN | 0550-3213 |
Electronic ISSN | 1873-1562 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 925 |
Pages | 1-27 |
DOI | https://doi.org/10.1016/j.nuclphysb.2017.10.002 |
Public URL | https://durham-repository.worktribe.com/output/1337693 |
Files
Published Journal Article
(662 Kb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/)
You might also like
Analytical Method for Next-to-Leading-Order QCD Corrections to Double-Higgs Production
(2018)
Journal Article
Maxi-sizing the trilinear Higgs self-coupling: how large could it be?
(2017)
Journal Article
Higgs-boson masses and mixing matrices in the NMSSM: analysis of on-shell calculations
(2017)
Journal Article
Probing new electroweak states via precision measurements at the LHC and future colliders
(2019)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search