Signals of $CP$ violation in Higgs decay

Abstract

We consider an extension of the Standard Model where some Higgs particle is not an eigenstate of $CP$, and discuss the possibility of extracting signals of the resulting $CP$ violation. In the case of Higgs decay to four fermions we study correlations among momenta of the final-state fermions. We discuss observables which may demonstrate presence of $CP$ violation and identify a phase shift $\delta$, which is a measure of the strength of $CP$ violation in the Higgs-vector-vector coupling, and which can be measured directly in the decay distribution. In addition to these angular correlations, we consider correlations between energy differences. The former correlations include some recently reported results, whereas the latter ones appear to provide a much better probe for revealing $CP$ violation.

11 pages (5 figures in Postscript appended as uuencoded tar-compressed file), LATEX (full postscript version available by anonymous ftp at node VSFYS1.FI.UIB.NO in subdirectory OSLAND, file BERGEN94-06.PS), Bergen Scientific/Technical Report No. 1994-06

References in corpus (5)

• Progress in Electroweak Baryogenesis
• Higgs Bosons: Intermediate Mass Range at e+e- Colliders
• Using Back-Scattered Laser Beams to Detect CP Violation in the Neutral Higgs Sector
• CP--odd Correlation in the Decay of Neutral Higgs Boson into $ZZ$, $W^{+}{W}^{-}$, or $t\bar{t}$
• Angular and energy correlations in Higgs decay

Cited by in corpus (21)

• Higgs Boson Theory and Phenomenology
• Fundamental CP-violating quantities in a SU(2)$\otimes$U(1) model with many Higgs doublets
• Aspects of CP violation in the HZZ coupling at the LHC
• Using Decay Angle Correlations to Detect CP Violation in the Neutral Higgs Sector
• Measuring the Higgs boson's parity using tau --> rho nu
• CP-violating ZZh Coupling at e+e- Linear Colliders
• Higgs CP properties using the tau decay modes at the ILC
• Determination of the Higgs CP mixing angle in the tau decay channels at the LHC including the Drell-Yan background
• Measuring the Higgs boson parity at a Linear Collider using the tau impact parameter and tau --> rho nu decay
• Searching for New Physics in the Three-Body Decays of the Higgs-like Particle
• Model-independent analysis of Higgs spin and CP properties in the process $e^{+}{e}^{-}\to t\bar{t}\Phi$
• Testing $CP$ in the Bjorken process
• Diagnosing CP properties of the 2HDM
• Explicit CP Violation in the MSSM Through Higgs --> gamma.gamma
• Probing Higgs Sector CP Violation with Top Quarks at a Photon Linear Collider
• Energy correlation and asymmetry of secondary leptons in $H\to t\bar{t}$ and $H\to W^{+}{W}^{-}$
• Exploring the Di-Photon Decay of a Light Higgs Boson in the MSSM With Explicit CP Violation
• Distinguishing CP-odd couplings of the Higgs boson to weak boson pairs
• Extended Higgs Sectors
• Measuring $CP$ nature of $h\tau \bar{\tau }$ coupling at $e^{-}p$ collider
• CP violation