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  • Letter
  • Open Access

Koba-Nielsen-Olesen-like scaling within a jet in proton-proton collisions at LHC energies

Róbert Vértesi1,*, Antal Gémes2,1, and Gergely Gábor Barnaföldi1

  • 1Wigner Research Centre for Physics, MTA Centre of Excellence, 29-33 Konkoly-Thege Miklós str., 1121 Budapest, Hungary
  • 2Trinity College, University of Cambridge, Cambridge CB2 1TQ, United Kingdom

  • *vertesi.robert@wigner.hu
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Phys. Rev. D 103, L051503 – Published 16 March, 2021

DOI: https://doi.org/10.1103/PhysRevD.103.L051503

Abstract

We study the multiplicity distributions of events with hard jets in proton-proton collisions at LHC energies using pythia 8 Monte-Carlo simulations. We demonstrate that the charged-hadron multiplicity distributions scale with jet momentum. This suggests that the Koba–Nielsen–Olesen (KNO) scaling holds within a jet. The in-jet scaling is fulfilled without multiple-parton interactions (MPI), but breaks down in case MPI is present without color reconnection. Our findings imply that KNO scaling is violated by parton shower or multiple-parton interactions in higher-energy collisions.

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Phys. Rev. D 103, L051503– Published 16 March, 2021
  • Received 18 December 2020
  • Accepted 15 February 2021
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