CP mixed property of the Higgs-like particle in the decay channel $h\to Z{Z}^{\ast }\to 4l$

Abstract

Current experiments do not support, as ATLAS and CMS collaborations at the Large Hadron Collider reported, that the Higgs-like resonance discovered in July 2012 is a pure CP-odd state. We examine a general $hZZ$ vertex which contains CP-even and CP-odd couplings, by studying the process $h\to Z{Z}^{\ast }\to l_1^{+}{l}_1^{-}{l}_2^{+}{l}_2^{-}$ with $l_1,l_2=e$ or $\mu$, to explore the CP mixed property of the Higgs-like particle. One momentum asymmetry and two angular asymmetries have been analyzed in order to reveal the difference from different CP-couplings. Our study shows that these asymmetries could be interesting observables in the future precise experiments.

13 pages, 6 figures, references and some discussion added

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• Nonstandard Higgs Couplings from Angular Distributions in $h\to Z{\ell }^{+}{\ell }^{-}$
• Probing the Higgs Couplings to Photons in $h\to 4\ell$ at the LHC
• Extracting Effective Higgs Couplings in the Golden Channel
• The role of interference in unraveling the ZZ-couplings of the newly discovered boson at the LHC
• Exploring Theory Space with Monte Carlo Reweighting
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• A note on Higgs decays into $Z$ boson and $J/\Psi ({\rm Y})$
• 8D Likelihood Effective Higgs Couplings Extraction Framework in the Golden Channel
• Golden Probe of Electroweak Symmetry Breaking
• Golden Probe of the Top Yukawa
• CP violation effects in the diphoton spectrum of heavy scalars
• Distinguishing CP-odd couplings of the Higgs boson to weak boson pairs
• Lepton-mass effects in the decays $H\to Z{Z}^{\ast }\to {\ell }^{+}{\ell }^{-}{\tau }^{+}{\tau }^{-}$ and $H\to W{W}^{\ast }\to \ell \nu \tau {\nu }_{\tau }$
• Higgs Boson Contributions to the Electron Electric Dipole Moment
• Adding Pseudo-Observables to the Four-Lepton Experimentalist's Toolbox
• Decays of a neutral particle with zero spin and arbitrary CP parity into two off-mass-shell Z bosons
• Anomalous $H\to ZZ\to 4\ell$ decay and its interference effects at the LHC