2025/11/26 by Li, Qianxi, Mao, Ying-nan, Wang, Kechen
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies
paper · doi:10.48550/arxiv.2511.21874
openalex publication_date 2025/11/26 · openalex created_date 2025/12/03 · openalex updated_date 2026/07/28
We propose a model-independent test of CP violation in the scalar sector. We consider a heavy neutral scalar h2 with tree-level couplings at the h2 V V and h2 h1 Z vertices (with V=W±,Z), alongside the 125~GeV SM-like Higgs boson h1. At future muon colliders (MuC), we exploit vector-boson-fusion (VBF) production of h2 followed by the decay h2 → Z h1. In our framework, observing the single process V V → h2 → Z h1 implies both relevant couplings are nonzero, which is sufficient to establish CP violation in the scalar sector. We simulate signal and backgrounds at √(s)=3~(10)~TeV with integrated luminosity L=0.9~(10)~ab-1. We then present the expected discovery sensitivities across the (c2,c12) parameter space (with the coupling parameters c2 and c12 defined in the text) for multiple mh2 hypotheses.