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arXiv · 2511.08359

Future Collider Perspectives on Higgs CP Violation

Arun Atwal·Jessica Burridge·António Jacques Costa·Christoph Englert·Sinead Farrington·Jay Nesbitt·Leonor Santos Pereira Trigo·Andrew Pilkington·Aidan Robson·Júlia Cardoso Silva·Sarah Williams·Yuyang Zhang
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Abstract

The search for new sources of CP violation is a cornerstone of the beyond the Standard Model phenomenology programme 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. Focussing 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 programme.

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Arun Atwal, Jessica Burridge, António Jacques Costa, Christoph Englert, Sinead Farrington, Jay Nesbitt, Leonor Santos Pereira Trigo, Andrew Pilkington, Aidan Robson, Júlia Cardoso Silva, Sarah Williams, Yuyang Zhang. 2025-11-11. Future Collider Perspectives on Higgs CP Violation. https://arxiv.org/abs/2511.08359

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