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Particle momentum spectra, correlations, and maximum entropy principle in high-multiplicity collision events

S. V. Akkelin

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Phys. Rev. D 112, 116007 – Published 5 December, 2025

DOI: https://doi.org/10.1103/k7mv-57bt

Abstract

In this paper, we utilize the maximum entropy prescription to determine a quantum state of a small collision system at the kinetic freeze-out. We derive expressions for multiplicity-selected particle momentum spectra and correlation functions by applying a fixed particle number constraint to this state. The results of our analysis can be useful for interpreting the multiplicity dependence of the particle momentum spectra and correlations in high-multiplicity pp collision events at a fixed LHC energy.

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Phys. Rev. D 112, 116007– Published 5 December, 2025
  • Received 3 October 2025
  • Accepted 6 November 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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