Left-right non-linear dynamical Higgs

TL;DR

This paper analyzes CP-conserving non-linear operators in a left-right symmetric model with a light Higgs, exploring how new spin-1 resonances from extended gauge symmetry influence low-energy phenomenology and effective operators.

Contribution

It provides a comprehensive classification of non-linear operators up to order p^4 in a left-right symmetric framework with a light Higgs, linking high-energy resonances to low-energy effects.

Findings

Identification of relevant effective operators influenced by spin-1 resonances.

Estimation of the scale suppression affecting low-energy phenomenology.

Implications for interpreting the diboson excess around 1.8-2 TeV.

Abstract

All the possible CP-conserving non-linear operators up to the $p^4$-order in the Lagrangian expansion are analysed here for the left-right symmetric model in the non-linear electroweak chiral context coupled to a light dynamical Higgs. The low energy effects will be triggered by an emerging new physics field content in the nature, more specifically, from spin-1 resonances sourced by the straightforward extension of the SM local gauge symmetry to the larger local group $SU(2)_L\otimes SU(2)_R\otimes U(1)_{B-L}$. Low energy phenomenology will be altered by integrating out the resonances from the physical spectrum, being manifested through induced corrections onto the left handed operators. Such modifications are weighted by powers of the scales ratio implied by the symmetries of the model and will determine the size of the effective operator basis to be used. The recently observed diboson excess around the invariant mass 1.8-2 TeV entails a scale suppression that suggests to encode the low energy effects via a much smaller set of effective operators.