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  • Open Access

Vectorlike dark matter within an alternative left-right symmetric model

Yassine Bouzeraib*

Mohamed Sadek Zidi†

Geneviève Bélanger‡

  • LPTh, Department of Physics, Faculty of Exact and Computer Sciences, University of Jijel, B. P. 98 Ouled Aissa, 18000 Jijel, Algeria

  • LPTh, Department of Physics, Faculty of Exact and Computer Sciences, University of Jijel, B. P. 98 Ouled Aissa, 18000 Jijel, Algeria

  • *Contact author: yassine.bouzeraib@univ-jijel.dz
  • †Contact author: mohamed.sadek.zidi@univ-jijel.dz
  • ‡Contact author: genevieve.belanger@lapth.cnrs.fr
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Phys. Rev. D 113, 095037 – Published 26 May, 2026

DOI: https://doi.org/10.1103/ksx2-z8s3

Abstract

We investigate an extension of the left-right symmetric model featuring an additional non-Abelian SU(2) gauge symmetry. The particle content is augmented by one generation of vectorlike leptons transforming under the fundamental representation of this new gauge group. We demonstrate that the neutral component of the vectorlike lepton multiplet naturally provides a viable and stable dark matter candidate. Stability is ensured by imposing a discrete parity symmetry that forbids mixing between the vectorlike leptons and the Standard Model leptons. As a consequence, the dark sector interacts with the visible sector exclusively through the vector portal (via s-channel processes) and the vectorlike lepton portal (via t-channel processes). In our analysis, we incorporate collider constraints on the mass of the first-generation extra charged gauge boson W′±, while assuming that additional scalar states are decoupled from the relevant energy scale for simplicity. We identify the regions of parameter space consistent with the observed relic abundance, collider bounds on the charged partner E±, current direct detection limits from the LUX-ZEPLIN experiment and indirect detection constraints from Fermi-Large Area Telescope. We find viable dark matter with a mass at the TeV scale. We show the complementarity of direct and indirect searches in probing the remaining parameter space of the model, in particular comparing the prospects of multiton direct detection experiments such as Xenon-Lux-Zeplin-Darwin and of the Cherenkov Telescope Array.

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Phys. Rev. D 113, 095037– Published 26 May, 2026
  • Received 11 March 2026
  • Accepted 24 April 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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