CP violation from spin-1 resonances in a left-right dynamical Higgs context

TL;DR

This paper investigates CP-violation effects induced by spin-1 resonances in a left-right symmetric model with a dynamical Higgs, analyzing the effective operators up to order p^4 and their phenomenological implications.

Contribution

It provides a complete classification of CP-violating operators in a non-linear left-right Higgs framework, including effects from integrating out heavy right-handed fields.

Findings

Identification of CP-violating operators up to p^4 order.

Analysis of impacts on gauge couplings and fermionic electric dipole moments.

Implications for CP-violation in Higgs decay processes.

Abstract

New physics field content in the nature, more specifically, from spin-1 resonances sourced by the extension of the SM local gauge symmetry to the larger local group $SU(2)_L\otimes SU(2)_R\otimes U(1)_{B-L}$, may induce CP-violation signalling NP effects from higher energy regimes. In this work we completely list and study all the CP-violating operators up to the $p^4$-order in the Lagrangian expansion, for a non-linear left-right electroweak chiral context and coupled to a light dynamical Higgs. Heavy right handed fields can be integrated out from the physical spectrum, inducing thus a physical impact in the effective gauge couplings, fermionic electric dipole moment, and CP-violation in the decay $h\rightarrow ZZ^*\rightarrow 4\,l$ that are briefly analysed. The final relevant set of effective operators have also been identified at low energies.