Nonlinear CP violation in the top-Higgs sector

Bhardwaj, A., Englert, C. , Gonçalves, D. and Navarro, A. (2023) Nonlinear CP violation in the top-Higgs sector. Physical Review D, 108(11), 115006. (doi: 10.1103/PhysRevD.108.115006)

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Searches for additional sources of CP violation at the Large Hadron Collider are a central part of the Higgs physics programme beyond the Standard Model. Studies employing so-called signed observables that track CP violation through purpose-built asymmetries bolster efforts based on Higgs boson rate analyses under clear assumptions. A possibility, which is so far unexplored at the LHC, is a significant non-linear realisation of CP-violation, which is naturally described in non-linear Higgs Effective Field Theory (HEFT). We perform an analysis of the HL-LHC potential to constrain such interactions considering a large range of single and double Higgs production processes, including differential information where this is statistically and theoretically possible. A particular emphasis of our work is distinguishing expected correlations in the Standard Model Effective Field Theory from those attainable in HEFT.

Item Type:Articles
Additional Information:A. B. and C. E. are supported by the STFC under Grant No. ST/T000945/1. C. E. is supported by the Leverhulme Trust under Grant No. RPG-2021-031 and the Institute for Particle Physics Phenomenology (IPPP) Associateship Scheme. D. G. and A. N. thank the U.S. Department of Energy for the financial support, under Grant No. DE-SC 0016013.
Glasgow Author(s) Enlighten ID:Bhardwaj, Dr Akanksha and Englert, Professor Christoph
Authors: Bhardwaj, A., Englert, C., Gonçalves, D., and Navarro, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN (Online):2470-0029
Copyright Holders:Copyright: © 2023 American Physical Society
First Published:First published in Physical Review D 108(11): 115006
Publisher Policy:Reproduced under a Creative Commons licence
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
306883Research in Particle Physics Theory - Phenomenology from lattice QCD and collider physicsChristine DaviesScience and Technology Facilities Council (STFC)ST/T000945/1P&S - Physics & Astronomy
311961BSM interference effects in Higgs and Top-associated final states.Christoph EnglertLeverhulme Trust (LEVERHUL)RPG-2021-031P&S - Physics & Astronomy