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Probing Strangeness Hadronization with Event-by-Event Production of Multistrange Hadrons.

S Acharya1, D Adamová2, A Agarwal3

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|February 6, 2025
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Summary
This summary is machine-generated.

This study measured fluctuations in multistrange hadrons and kaons across different collision types. Statistical hadronization models accurately predicted these fluctuations, unlike string-fragmentation models.

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Area of Science:

  • High-energy nuclear physics
  • Particle physics
  • Quantum chromodynamics

Background:

  • Understanding particle production mechanisms in high-energy collisions is crucial.
  • Multistrange hadrons and kaons are sensitive probes of the hot and dense medium created in heavy-ion collisions.
  • Event-by-event fluctuations provide insights into the early stages of particle production.

Purpose of the Study:

  • To present the first measurement of event-by-event fluctuations of net Ξ^{-} and Ξ[over ¯]^{+} hadron numbers.
  • To investigate the correlation between these fluctuations and net-kaon number.
  • To test the validity of different theoretical models in describing these phenomena.

Main Methods:

  • Analysis of data from proton-proton (pp), proton-lead (p-Pb), and lead-lead (Pb-Pb) collisions.
  • Measurements conducted by the ALICE Collaboration at a center-of-mass energy of 5.02 TeV per nucleon pair.
  • Comparison of experimental results with predictions from the statistical hadronization model and string-fragmentation models.

Main Results:

  • The study reports the first measurements of net Ξ^{-} and Ξ[over ¯]^{+} fluctuations and their correlation with net-kaon number.
  • The statistical hadronization model, incorporating correlations over three units of rapidity between hadrons with same and opposite strangeness, successfully describes the data.
  • String-fragmentation models, which primarily correlate strange hadrons with opposite strange quark content over a limited rapidity range, fail to reproduce the experimental observations.

Conclusions:

  • The findings support the statistical hadronization model as a suitable framework for describing particle production, including multistrange hadrons and kaons.
  • The results highlight the importance of considering correlations over extended rapidity ranges and between hadrons with similar strangeness content.
  • The failure of string-fragmentation models suggests limitations in their ability to capture the complex interplay of strangeness production in these collisions.