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Charged particle multiplicity ( \(N_{ch}\) ) is a key observable in high-energy hadronic collisions, offering insight into particle production mechanisms and the hadronization process. In these proceedings, we report our results on \(N_{ch}\) distributions in simulated proton-proton collisions using Pythia8 event generator. We present the effects of multiple parton interactions (MPI) and color reconnection (CR) on the \(N_{ch}\) spectra. Furthermore, the \(N_{ch}\) spectra were examined across different pseudorapidity regions and at various proton-proton collision energies at the LHC. Koba-Nielsen-Olesen (KNO) scaling was applied at these energies. Finally, a Data vs. Monte Carlo (MC) comparison of the \(N_{ch}\) spectra is presented using published data from the Compact Muon Solenoid (CMS) experiment.

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Investigation of Charged Particle Multiplicity Distributions and KNO Scaling in Proton-Proton Collisions at LHC Energies Using PYTHIA

  • 会议论文

  • 发表日期：

    2025年

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  • Niharika Shrivastav,
  • Bibhuti Parida

摘要

Charged particle multiplicity ( \(N_{ch}\) ) is a key observable in high-energy hadronic collisions, offering insight into particle production mechanisms and the hadronization process. In these proceedings, we report our results on \(N_{ch}\) distributions in simulated proton-proton collisions using Pythia8 event generator. We present the effects of multiple parton interactions (MPI) and color reconnection (CR) on the \(N_{ch}\) spectra. Furthermore, the \(N_{ch}\) spectra were examined across different pseudorapidity regions and at various proton-proton collision energies at the LHC. Koba-Nielsen-Olesen (KNO) scaling was applied at these energies. Finally, a Data vs. Monte Carlo (MC) comparison of the \(N_{ch}\) spectra is presented using published data from the Compact Muon Solenoid (CMS) experiment.