Constraints on CP-violating gauge-Higgs operators

Abstract

We consider the most general set of $SU(2)\times U(1)$ invariant CP-violating operators of dimension six, which contribute to $VVh$ interactions ($V=W,Z,\gamma$). Our aim is to constrain any CP-violating new physics above the electroweak scale via the effective couplings that arise when such physics is integrated out. For this purpose, we use, in turn, electroweak precision data, global fits of Higgs data at the Large Hadron Collider and the electric dipole moments of the neutron and the electron. We thus impose constraints mainly on two-parameter and three-parameter spaces. We find that the constraints from the electroweak precision data are the weakest. Among the existing Higgs search channels, considerable constraints come from the diphoton signal strength. We note that potential contribution to $h\to \gamma Z$ may in principle be a useful constraining factor, but it can be utilized only in the high energy run. The contributions to electric dipole moments mostly lead to the strongest constraints, though somewhat fine-tuned combinations of more than one parameter with large magnitudes are allowed. We also discuss constraints on gauge boson trilinear couplings which depend on the parameters of the CP-violating operators .

Published in Physical Review D

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• Better Higgs-CP Tests Through Information Geometry
• $\mathbf{C}\mathbf{P}$ violation in Higgs-gauge interactions: from tabletop experiments to the LHC
• Sum rules for CP-violating operators of Weinberg type
• Probing CP-violating Higgs and gauge boson couplings in the Standard Model effective field theory
• Exploring anomalous $HZ\gamma$ couplings in $\gamma$-proton collisions at the LHC
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• Probing CP-violating $h\bar{t}t$ coupling in $e^{+}{e}^{-}\to h\gamma$
• CP-violating Higgs-gauge boson couplings in $H\nu \bar{\nu }$ production at three energy stages of CLIC
• Extended scalar sectors, effective operators and observed data
• The Electric Dipole Moment of the electron in the decoupling limit of the aligned Two-Higgs Doublet Model
• $CP$-odd form factor in the $HWW$ vertex
• Beautiful and charming chromodipole moments