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Constraining scalar resonances with top-quark pair production at the LHC

Journal of High Energy Physics volume 2018, Article number: 22 (2018) Cite this article

A preprint version of the article is available at arXiv.

Abstract

Constraints on models which predict resonant top-quark pair production at the LHC are provided via a reinterpretation of the Standard Model (SM) particle level measurement of the top-anti-top invariant mass distribution, \( m\left(t\overline{t}\right) \). We make use of state-of-the-art Monte Carlo event simulation to perform a direct comparison with measurements of \( m\left(t\overline{t}\right) \) in the semi-leptonic channels, considering both the boosted and the resolved regime of the hadronic top decays. A simplified model to describe various scalar resonances decaying into top-quarks is considered, including CP-even and CP-odd, color-singlet and color-octet states, and the excluded regions in the respective parameter spaces are provided.

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  1. Institut für Theoretische Physik, Universität Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany

    Diogo Buarque Franzosi & Steffen Schumann

  2. Dipartimento di Fisica e Astronomia, Università di Bologna and INFN, Sezione di Bologna, Viale Berti Pichat 6/2, 40127, Bologna, Italy

    Federica Fabbri

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  1. Diogo Buarque Franzosi
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Correspondence to Diogo Buarque Franzosi.

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ArXiv ePrint: 1711.00102

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Franzosi, D.B., Fabbri, F. & Schumann, S. Constraining scalar resonances with top-quark pair production at the LHC. J. High Energ. Phys. 2018, 22 (2018). https://doi.org/10.1007/JHEP03(2018)022

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  • DOI: https://doi.org/10.1007/JHEP03(2018)022

Keywords

  • Beyond Standard Model
  • Perturbative QCD
  • Technicolor and Composite Models