Analyzing the CP Nature of a New Scalar Particle via S->Zh Decay

Abstract

Scalar particles $S$ which are singlets under the Standard Model gauge group are generic features of many models of fundamental physics, in particular as possible mediators to a hidden sector. We show that the decay $S\to Zh$ provides a powerful probe of the CP nature of the scalar, because it is allowed only if $S$ has CP-odd interactions. We perform a model-independent analysis of this decay using an effective Lagrangian and compute the relevant Wilson coefficients arising from integrating out heavy fermions to one-loop order.

arXiv commentThis letter is a significantly rewritten descendent of our previous work arXiv:1607.01016, which was motivated by the 750 GeV diphoton resonance. The current version contains relevant new material and is independent of the existence of such a resonance (6 pages, 4 figures; accepted for publication in Phys. Rev. Lett.)

References in corpus (16)

• Precision Electroweak Measurements on the Z Resonance
• Bulk Fields and Supersymmetry in a Slice of AdS
• Neutrino masses and mixings in non-factorizable geometry
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• Conditions for CP-Violation in the General Two-Higgs-Doublet Model
• Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector
• A search for $t\bar{t}$ resonances using lepton-plus-jets events in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for resonant production of high-mass photon pairs in proton-proton collisions at sqrt(s) = 8 and 13 TeV
• Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
• Probing CP Violation Via Higgs Decays to Four Leptons
• Digamma, what next?
• Diphoton Resonance from a Warped Extra Dimension
• A Diphoton Resonance from Bulk RS
• Diboson Excesses Demystified in Effective Field Theory Approach
• Deciphering the CP nature of the 750 GeV resonance
• The Phenomenology of the CP-odd Scalar of Two-Doublet Models

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