Coordinate versus momentum cuts and effects of collective flow on critical fluctuations

Kuznietsov, Volodymyr A.; Gorenstein, Mark I.; Koch, Volker; Vovchenko, Volodymyr

doi:10.1103/PhysRevC.110.015206

Title: Coordinate versus momentum cuts and effects of collective flow on critical fluctuations

Journal Article · 19 July 2024 · Physical Review. C

DOI: https://doi.org/10.1103/PhysRevC.110.015206 · OSTI ID:2474088

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We analyze particle number fluctuations in the crossover region near the critical endpoint of a first-order phase transition by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid. We extend our previous study [V. A. Kuznietsov , ] by incorporating longitudinal collective flow. The scaled variance of particle number distribution inside different coordinate and momentum space acceptances is computed through ensemble averaging and found to agree with earlier results obtained using time averaging, validating the ergodic hypothesis for fluctuation observables. Presence of a sizable collective flow is found to be essential for observing large fluctuations from the critical point in momentum space acceptances. We discuss our findings in the context of heavy-ion collisions. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-05CH11231; AC02-05CH11231

OSTI ID:: 2474088

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 1 Vol. 110; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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