Testing CP-violation in a Heavy Higgs Sector at CLIC
Abstract
We propose to probe CP-violation in the heavy (pseudo)scalar sector of an extended Higgs model, in which we make simultaneous use of the () and interactions of a heavy Higgs state . The CP-even component of can be probed through the tree level interaction while the CP-odd component of can be probed if the final pair can be tested to form a state. We can then confirm CP-violation if both CP-even and CP-odd components of are discovered. This is possible at the Compact Linear Collider (CLIC) by exploiting production from Vector-Boson Fusion (VBF) and decay to pairs. We analyze the distribution of the azimuthal angle between the leptons coming from top and antitop quarks, that would allow one to disentangle the CP nature of such a heavy Higgs state. We also show its implications for the 2-Higgs-Doublet Model (2HDM) with CP-violation.
Cite
@article{arxiv.2304.04390,
title = {Testing CP-violation in a Heavy Higgs Sector at CLIC},
author = {Kingman Cheung and Ying-nan Mao and Stefano Moretti and Rui Zhang},
journal= {arXiv preprint arXiv:2304.04390},
year = {2025}
}
Comments
24 pages, 6 figures; re-analyzed including the beam polarisation effects for CLIC as: $P_+=0$, $P_-=-0.8$ for 80% luminosity, and $P_-=+0.8$ for 20% luminosity; integrated luminosity fixed at 2.5 (5) ab$^{-1}$ for $\sqrt{s}=1.5 (3)$ TeV; selection cuts fixed to match CLIC detector; references added; EPJC accepted version