Direct bounds on Left-Right gauge boson masses at LHC Run 2

TL;DR

This paper recasts LHC Run 2 data to set direct, model-independent bounds on Left-Right Model gauge boson masses, considering scalar content effects and quark mixing structures, constraining $W_R$ and $Z_R$ masses above 2 TeV and 4 TeV.

Contribution

It provides novel, model-independent bounds on LRM gauge boson masses by analyzing the impact of scalar content and quark mixing on collider signals.

Findings

$W_R$ mass constrained above 2 TeV.

$Z_R$ mass constrained above 4 TeV.

Bounds are model-independent and account for scalar and mixing effects.

Abstract

While the third run of the Large Hadron Collider (LHC) is ongoing, the underlying theory that extends the Standard Model remains so far unknown. Left-Right Models (LRMs) introduce a new gauge sector, and can restore parity symmetry at high enough energies. If LRMs are indeed realized in nature, the mediators of the new weak force can be searched for in colliders via their direct production. We recast existing experimental bounds from LHC Run 2 on the heavy LRM gauge boson masses. As a novelty, we discuss the effect of the LRM scalar content on the total width of the new gauge bosons, obtaining model-independent bounds within the specific realizations of the LRM scalar sectors analysed here. These bounds avoid the need to detail the spectrum of the scalar sector, and apply in the general case where no discrete symmetry is enforced. Moreover, we emphasize the effect of the structure of the quark right-handed mixing matrix on the charged LRM gauge boson production at LHC. We find that $W_R$ and $Z_R$ masses are constrained to lie above $2$ TeV and $4$ TeV, respectively.