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Pileup and Infrared Radiation Annihilation (PIRANHA): a paradigm for continuous jet grooming

  • Regular Article - Theoretical Physics
  • Open access
  • Published: 22 September 2023
  • Volume 2023, article number 157, (2023)
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Journal of High Energy Physics Aims and scope Submit manuscript
Pileup and Infrared Radiation Annihilation (PIRANHA): a paradigm for continuous jet grooming
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  • Samuel Alipour-fard  ORCID: orcid.org/0000-0001-9381-10101,2,
  • Patrick T. Komiske  ORCID: orcid.org/0000-0002-2983-95181,
  • Eric M. Metodiev  ORCID: orcid.org/0000-0002-3995-56861 &
  • …
  • Jesse Thaler  ORCID: orcid.org/0000-0002-2406-81601,2 

  • 214 Accesses

  • 3 Citations

  • 1 Altmetric

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A preprint version of the article is available at arXiv.

Abstract

Jet grooming is an important strategy for analyzing relativistic particle collisions in the presence of contaminating radiation. Most jet grooming techniques introduce hard cutoffs to remove soft radiation, leading to discontinuous behavior and associated experimental and theoretical challenges. In this paper, we introduce Pileup and Infrared Radiation Annihilation (Piranha), a paradigm for continuous jet grooming that overcomes the discontinuity and infrared sensitivity of hard-cutoff grooming procedures. We motivate Piranha from the perspective of optimal transport and the Energy Mover’s Distance and review Apollonius Subtraction and Iterated Voronoi Subtraction as examples of Piranha-style grooming. We then introduce a new tree-based implementation of Piranha, Recursive Subtraction, with reduced computational costs. Finally, we demonstrate the performance of Recursive Subtraction in mitigating sensitivity to soft distortions from hadronization and detector effects, and additive contamination from pileup and the underlying event.

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Acknowledgments

The authors would like to express their gratitude to Matthew LeBlanc, Jennifer Roloff, and the ATLAS Jet Definitions subgroup for valuable discussions, and to Nima Zardoshti for raising insightful questions during LHCP 2022. We would also like to thank Pier Monni for helpful discussions regarding resummation, and Sean Benevedes and Rikab Gambhir for engaging conversations and careful readings of the manuscript. Finally, we extend our appreciation to an anonymous referee whose thoughtful comments and feedback contributed to improving the quality and clarity of this work and especially of section 3. This work was supported by the Office of Nuclear Physics of the U.S. Department of Energy (DOE) under grant DE-SC-0011090, by the DOE Office of High Energy Physics under grants DE-SC0012567 and DE-SC0019128, and by the National Science Foundation under Cooperative Agreement PHY-2019786 (The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, http://iaifi.org).

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  1. Center for Theoretical Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA

    Samuel Alipour-fard, Patrick T. Komiske, Eric M. Metodiev & Jesse Thaler

  2. The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, Cambridge, MA, USA

    Samuel Alipour-fard & Jesse Thaler

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Alipour-fard, S., Komiske, P.T., Metodiev, E.M. et al. Pileup and Infrared Radiation Annihilation (PIRANHA): a paradigm for continuous jet grooming. J. High Energ. Phys. 2023, 157 (2023). https://doi.org/10.1007/JHEP09(2023)157

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  • Received: 23 June 2023

  • Accepted: 12 September 2023

  • Published: 22 September 2023

  • DOI: https://doi.org/10.1007/JHEP09(2023)157

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Keywords

  • Jets and Jet Substructure
  • Specific QCD Phenomenology
  • Parton Shower
  • Resummation
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