Classifying the CP properties of the ggH coupling in H+2j production

authored by: Henning Bahl, Elina Fuchs, Marco Menen, Marc Hannig
Abstract: The Higgs-gluon interaction is crucial for LHC phenomenology. To improve the constraints on the CP structure of this coupling, we investigate Higgs production with two jets using machine learning. In particular, we exploit the CP sensitivity of the so far neglected phase space region that differs from the typical vector boson fusion-like kinematics. Our results indicate that further improvements in the current experimental limits could be achievable using our techniques. We also discuss the most relevant observables and how CP violation in the Higgs–gluon interaction can be disentangled from CP violation in the interaction between the Higgs boson and massive vector bosons. Assuming the absence of CP-violating Higgs interactions with coloured beyond-the-Standard-Model states, our projected limits on a CP-violating top-Yukawa coupling are competitive with more direct probes like top-associated Higgs production and limits from a global fit.
Organisation(s): Institute of Theoretical Physics
External Organisation(s): University of Chicago
CERN
Physikalisch-Technische Bundesanstalt PTB
Type: Article
Journal: SciPost Physics
Volume: 8
No. of pages: 34
Publication date: 20.01.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Statistical and Nonlinear Physics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics, Condensed Matter Physics
Electronic version(s): https://doi.org/10.21468/SciPostPhysCore.8.1.006 (Access: Open)

BibTeX

@article{810873aefbd3441d873b3448788a98b6,
title = "Classifying the CP properties of the ggH coupling in H+2j production",
abstract = "The Higgs-gluon interaction is crucial for LHC phenomenology. To improve the constraints on the CP structure of this coupling, we investigate Higgs production with two jets using machine learning. In particular, we exploit the CP sensitivity of the so far neglected phase space region that differs from the typical vector boson fusion-like kinematics. Our results indicate that further improvements in the current experimental limits could be achievable using our techniques. We also discuss the most relevant observables and how CP violation in the Higgs–gluon interaction can be disentangled from CP violation in the interaction between the Higgs boson and massive vector bosons. Assuming the absence of CP-violating Higgs interactions with coloured beyond-the-Standard-Model states, our projected limits on a CP-violating top-Yukawa coupling are competitive with more direct probes like top-associated Higgs production and limits from a global fit.",
author = "Henning Bahl and Elina Fuchs and Marco Menen and Marc Hannig",
note = "Publisher Copyright: Copyright H. Bahl et al.",
year = "2025",
month = jan,
day = "20",
doi = "10.21468/SciPostPhysCore.8.1.006",
language = "English",
volume = "8",
journal = "SciPost Physics",
issn = "2542-4653",
publisher = "SciPost Foundation",
number = "1",
}