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Fresh look at the LHC limits on vector leptoquarks

Arijit Das1,*, Tanumoy Mandal1,†, Subhadip Mitra2,3,‡, and Rachit Sharma1,§

  • *Contact author: arijit21@iisertvm.ac.in
  • †Contact author: tanumoy@iisertvm.ac.in
  • ‡Contact author: subhadip.mitra@iiit.ac.in
  • §Contact author: rachit21@iisertvm.ac.in
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Phys. Rev. D 113, 055007 – Published 3 March, 2026

DOI: https://doi.org/10.1103/4rqk-rjjr

Abstract

Vector leptoquarks (vLQs) are popular candidates for searching for physics beyond the Standard Model (SM). In this paper, we present updated exclusion limits on various vLQ species, accounting for all the relevant production mechanisms at the LHC. In particular, we highlight the critical role of indirect production and its interference with the SM Drell-Yan process. This interference can be constructive or destructive, depending on the specific quantum numbers of the vLQ, and significantly impacts the sensitivity of current searches. Furthermore, we demonstrate that including QCD+QED mixed pair production channels leads to a noticeable shift in model-independent mass limits. Additionally, we examine the validity of the full theory with vLQs and corresponding effective operators in the high mass regime. Overall, our analysis yields a substantial improvement in the exclusion limits on vLQs compared to the existing results in the literature.

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Fresh look at the LHC limits on scalar leptoquarks

Arvind Bhaskar, Arijit Das, Tanumoy Mandal, Subhadip Mitra, and Rachit Sharma
Phys. Rev. D 109, 055018 (2024)

Article Text

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Phys. Rev. D 113, 055007– Published 3 March, 2026
  • Received 4 August 2025
  • Accepted 3 February 2026
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