Work

Updated bounds on the minimal left-right symmetric model from LHC dilepton resonance searches

Year: 2026

Type: article

Abstract: The Left-Right model is a popular extension of the Standard Model that features the new gauge bosons, $$W^{\pm }_R$$ W R ± and $$Z_R$$ Z R . Collider searches for a Left-Right symmetry are often concentrated on the charged right-handed current. However, in this work, we take advantage of the dilepton data at the LHC with center-of-mass energy of 13 TeV and 139 $$\hbox {fb}^{-1}$$ fb - 1 of integrated luminosity to place lower mass bounds in the $$Z_R$$ Z R mass based on the $$p\,p \rightarrow Z_{R} \rightarrow \ell ^{+} \, \ell ^{-}+X$$ p p → Z R → ℓ + ℓ - + X process. We vary the $$SU(2)_R$$ S U ( 2 ) R gauge coupling from $$g_{R}=0.4$$ g R = 0.4 to $$g_{R}=1.0$$ g R = 1.0 , and find that the LHC data impose $$M_{Z_R}>5.4$$ M Z R > 5.4 TeV and $$M_{Z_{R}}>6.1$$ M Z R > 6.1 TeV, respectively. Lastly, we put our findings into perspective with $$W_R$$ W R searches at the LHC and show that our limits cover an unexplored region of parameter space, where the right-handed neutrino is heavier than the $$W_R$$ W R boson.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-026-15383-y

Authors: Gabriela Lichtenstein, M. J. Neves, Farinaldo Queiroz, Ricardo C. Silva

Institutions: Universidade Federal do Rio Grande do Norte, Universidade Federal Rural do Rio de Janeiro, Millennium Institute for Subatomic Physics at High-Energy Frontier, Saphir, University of La Serena, Sorbonne Université

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond