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arXiv · 2507.05942

V-Associated Production & Vector Boson Fusion as an LHC Signature of CP Violation

Rodrigo Capucha·Álvaro Lozano-Onrubia·Luca Merlo·José Miguel No·Rui Santos
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Abstract

We investigate the role of vector boson fusion (VBF) and associated production with an electroweak boson (V-AP) of beyond-the-Standard-Model Higgses at the LHC in probing CP violation in extended Higgs sectors. Resonant production of a new Higgs boson through V-AP/VBF subsequently decaying into a Z boson and a 125 GeV Higgs boson h would be a robust sign of CP violation, since h has been measured to be (predominantly) a CP-even state. After identifying this and other sets of signatures which rely on V-AP/VBF to jointly uncover CP violation, we analyze the prospects to measure CP violation in this way for the complex two-Higgs-doublet-model at the High-Luminosity LHC.

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Rodrigo Capucha, Álvaro Lozano-Onrubia, Luca Merlo, José Miguel No, Rui Santos. 2025-07-08. V-Associated Production & Vector Boson Fusion as an LHC Signature of CP Violation. https://arxiv.org/abs/2507.05942

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