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  • Open Access

LHC signals for a 2HDM with Z′ in a neutrinophilic U(1) model

Anjan Kumar Barik*, Santosh Kumar Rai†, and Agnivo Sarkar‡

  • Regional Centre for Accelerator-Based Particle Physics, Harish-Chandra Research Institute, A CI of Homi Bhabha National Institute, Chhatnag Road, Jhunsi, Prayagraj 211019, India

  • *Contact author: anjanbarik@hri.res.in
  • †Contact author: skrai@hri.res.in
  • ‡Contact author: agnivosarkar@hri.res.in
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Phys. Rev. D 112, 095011 – Published 10 November, 2025

DOI: https://doi.org/10.1103/dcjh-13gw

Abstract

We consider a neutrinophilic U(1) extension of the Standard Model (SM) under which only a second Higgs doublet and SM singlet scalars and fermions are charged. The new gauge boson Z′ couples to the SM minimally, generated by Z−Z′ mixing. As the Z′ is very weakly coupled, it can mostly be produced through the decay of the scalars from the second Higgs doublet at the Large Hadron Collider (LHC). We discuss the scalar sector of the model in detail and consider decay modes such as (H±→W±Z′,h2→VV,(V=W±,Z,Z′),A2→h1Z′(Z)) that lead to multilepton signals at the LHC from the pair production of the scalars. We analyze the signal with a representative value of the Z′ mass to show the discovery potential of the two-Higgs doublet model scalars at the LHC.

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Phys. Rev. D 112, 095011– Published 10 November, 2025
  • Received 25 January 2025
  • Accepted 9 October 2025
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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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