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Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD

  • Regular Article - Theoretical Physics
  • Open access
  • Published: 07 February 2023
  • Volume 2023, article number 70, (2023)
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Journal of High Energy Physics Aims and scope Submit manuscript
Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD
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  • Ulrich Haisch1,
  • Luc Schnell  ORCID: orcid.org/0000-0003-2073-98171,2 &
  • Stefan Schulte1,2 

  • 198 Accesses

  • 6 Citations

  • 1 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

Motivated by the long-standing hints of lepton-flavour non-universality in the b → cℓν and b → sℓ+ℓ− channels, we study Drell-Yan ditau production at the Large Hadron Collider (LHC). In the context of models with third-generation gauge vector leptoquarks (LQs), we calculate the complete \( \mathcal{O} \)(αs) corrections to the pp → τ+τ− process, achieving next-to-leading order (NLO) plus parton shower (NLO+PS) accuracy using the POWHEG method. We provide a dedicated Monte Carlo code that evaluates the NLO QCD corrections on-the-fly in the event generation and use it to study the numerical impact of NLO+PS corrections on the kinematic distributions that enter the existing experimental searches for non-resonant ditau final states. Based on our phenomenological analysis we derive NLO accurate constraints on the masses and couplings of third-generation gauge vector LQs using the latest LHC ditau search results corresponding to an integrated luminosity of around 140 fb−1 of proton-proton collisions at \( \sqrt{s} \) = 13 TeV. The presented NLO+PS generator allows for an improved signal modelling, making it an essential tool for future ATLAS and CMS searches for vector LQs in τ+τ− final states at LHC Run III and beyond.

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Authors and Affiliations

  1. Max Planck Institute for Physics, Föhringer Ring 6, 80805, München, Germany

    Ulrich Haisch, Luc Schnell & Stefan Schulte

  2. Physik-Department, Technische Universität München, James-Franck-Strasse 1, 85748, Garching, Germany

    Luc Schnell & Stefan Schulte

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  1. Ulrich Haisch
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Correspondence to Luc Schnell.

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Haisch, U., Schnell, L. & Schulte, S. Drell-Yan production in third-generation gauge vector leptoquark models at NLO+PS in QCD. J. High Energ. Phys. 2023, 70 (2023). https://doi.org/10.1007/JHEP02(2023)070

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  • Received: 20 October 2022

  • Accepted: 10 January 2023

  • Published: 07 February 2023

  • DOI: https://doi.org/10.1007/JHEP02(2023)070

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Keywords

  • Specific BSM Phenomenology
  • Higher-Order Perturbative Calculations
  • Bottom Quarks
  • Specific QCD Phenomenology
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