Direct bounds on Left-Right gauge boson masses

TL;DR

This paper derives direct bounds on the masses of new gauge bosons predicted by Left-Right Models using LHC data, providing model-independent constraints that depend on the scalar sector and quark mixing textures.

Contribution

It introduces a method to set bounds on LRM gauge boson masses that are independent of detailed scalar spectra and explores the effects of right-handed quark mixing textures on collider searches.

Findings

W_R and Z_R masses constrained above 2 TeV and 4 TeV respectively.

Bounds are model-independent within analyzed scalar sector realizations.

Impact of right-handed quark mixing textures on W_R production analyzed.

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 limits from the LHC Run 2 and derive generic bounds on the masses of the heavy LRM gauge bosons. As a novelty, we discuss the dependence of the $W_R$ and $Z_R$ total decay width on the LRM scalar content, 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 impact on the $W_R$ production at LHC of general textures of the right-handed quark mixing matrix without manifest left-right symmetry. We find that the $W_R$ and $Z_R$ masses are constrained to lie above $2$ TeV and $4$ TeV, respectively.