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Future collider perspectives on Higgs sector CP violation

Arun Atwal1, Jessica Burridge2,*, António Jacques Costa2,†, Christoph Englert2,‡, Sinead Farrington3,4,§, Jay Nesbitt5,∥, Leonor Santos Pereira Trigo6,¶, Andrew Pilkington2,**, Aidan Robson5,†† et al.

Júlia Cardoso Silva3,‡‡, Sarah Williams1,§§, and Yuyang Zhang5,∥∥

  • *Contact author: jessica.burridge@postgrad.manchester.ac.uk
  • †Contact author: antonio.mendesjacquesdacosta@manchester.ac.uk
  • ‡Contact author: christoph.englert@manchester.ac.uk
  • §Contact author: sinead.farrington@ed.ac.uk
  • ∥Contact author: jay.nesbitt@glasgow.ac.uk
  • Contact author: leonor.santos@desy.de
  • **Contact author: andrew.pilkington@manchester.ac.uk
  • ††Contact author: aidan.robson@glasgow.ac.uk
  • ‡‡Contact author: jcardoso@ed.ac.uk
  • §§Contact author: sarahw@hep.phy.cam.ac.uk
  • ∥∥Contact author: y.zhang.15@research.gla.ac.uk
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Phys. Rev. D 113, 115026 – Published 11 June, 2026

DOI: https://doi.org/10.1103/hvrk-d82n

Abstract

The search for new sources of CP violation is a cornerstone of the beyond the Standard Model (BSM) phenomenology program at the LHC and beyond. We provide a comprehensive analysis of such searches at a range of future facilities with the aim of informing the currently unfolding future collider roadmap. Focusing on new sources of CP violation specifically in the gauge-Higgs sector, we demonstrate the outstanding potential held by future electron-positron and proton-proton colliders to reveal and identify BSM physics with direct relevance for the observed matter-antimatter asymmetry. In particular, the future colliders will provide an order of magnitude improvement in sensitivity to anomalous CP-violating interactions induced by dimension-six effective field theory operators when compared to the high-luminosity LHC program.

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Phys. Rev. D 113, 115026– Published 11 June, 2026
  • Received 30 November 2025
  • Accepted 11 May 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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