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  • Open Access

Drell-Yan constraints on charged scalars: A weak isospin perspective

Avik Banerjee1,*, Dipankar Das2,†, Samadrita Mukherjee3,‡, and Shreya Pandey2,§

  • *Contact author: avik.banerjee_205@tifr.res.in
  • †Contact author: d.das@iiti.ac.in
  • ‡Contact author: samadritam@iisc.ac.in
  • §Contact author: shreyavatspandey@gmail.com
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Phys. Rev. D 111, 115014 – Published 16 June, 2025

DOI: https://doi.org/10.1103/lbt4-1gn3

Abstract

Charged scalars appear in many motivated extensions beyond the Standard Model. We analyze the constraints on charged scalar pair production via the Drell-Yan process at the Large Hadron Collider and interpret them in terms of weak isospin quantum numbers. Leveraging the experimental limits from existing LHC data and phenomenological recast analyses, we place bounds on the branching ratio of the charged scalar as a function of its mass, electric charge, and isospin. This approach enables us to determine limits on the branching ratios directly from experimental data, without appealing to a specific model. We provide a detailed analysis for singly and doubly charged scalars across various weak isospin scenarios, focusing on decays into leptonic and bosonic final states, and we validate this approach in extended Higgs sectors such as the Higgs triplet model and the Georgi-Machacek model.

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Phys. Rev. D 111, 115014– Published 16 June, 2025
  • Received 28 January 2025
  • Accepted 28 May 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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