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)

Abstract

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.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Englert, Professor Christoph and Bhardwaj, Dr Akanksha
• 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: 2470-0010
• 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 Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
306883		Research in Particle Physics Theory - Phenomenology from lattice QCD and collider physics	Christine Davies	Science and Technology Facilities Council (STFC)	ST/T000945/1	P&S - Physics & Astronomy
311961		BSM interference effects in Higgs and Top-associated final states.	Christoph Englert	Leverhulme Trust (LEVERHUL)	RPG-2021-031	P&S - Physics & Astronomy