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Dynamical Grooming meets LHC data

  • Regular Article - Theoretical Physics
  • Open Access
  • Published: 06 July 2021
  • volume 2021, Article number: 20 (2021)
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Dynamical Grooming meets LHC data
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  • Paul Caucal1,2,
  • Alba Soto-Ontoso1 &
  • Adam Takacs3,4 

  • 133 Accesses

  • 9 Citations

  • 2 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

In this work, we analyse the all-orders resummation structure of the momentum sharing fraction, zg, opening angle, θg, and relative transverse momentum, kt,g, of the splitting tagged by the Dynamical Grooming procedure in hadronic collisions. We demonstrate that their resummation does non-exponentiate and it is free of clustering logarithms. Then, we analytically compute the probability distributions of (zg, θg, kt,g) up to next-to-next-to-double logarithm accuracy (N2DL) in the narrow jet limit, including a matching to leading order in αs. On the phenomenological side, we perform an analytic-to-parton level comparison with Pythia and Herwig. We find that differences between the analytic and the Monte-Carlo results are dominated by the infra-red regulator of the parton shower. Further, we present the first analytic comparison to preliminary ALICE data and highlight the role of non-perturbative corrections in such low-pt regime. Once the analytic result is corrected by a phenomenologically determined non-perturbative factor, we find very good agreement with the data.

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Authors and Affiliations

  1. Institut de Physique Théorique, Université Paris-Saclay, CNRS, CEA, F-91191, Gif-sur-Yvette, France

    Paul Caucal & Alba Soto-Ontoso

  2. Physics Department, Brookhaven National Laboratory, Upton, NY, 11973, USA

    Paul Caucal

  3. Department of Physics and Technology, University of Bergen, 5020, Bergen, Norway

    Adam Takacs

  4. Department of Astronomy and Theoretical Physics, Lund University, S-223 62, Lund, Sweden

    Adam Takacs

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  1. Paul Caucal
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  2. Alba Soto-Ontoso
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  3. Adam Takacs
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Correspondence to Alba Soto-Ontoso.

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Caucal, P., Soto-Ontoso, A. & Takacs, A. Dynamical Grooming meets LHC data. J. High Energ. Phys. 2021, 20 (2021). https://doi.org/10.1007/JHEP07(2021)020

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  • Received: 17 March 2021

  • Accepted: 16 June 2021

  • Published: 06 July 2021

  • DOI: https://doi.org/10.1007/JHEP07(2021)020

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Keywords

  • Perturbative QCD
  • Resummation
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