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Volume Fluctuation and Autocorrelation Effects in the Moment Analysis of Net-proton Multiplicity Distributions in Heavy-Ion Collisions

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arxiv 1302.2332 v2 pith:OVSWPXGG submitted 2013-02-10 nucl-ex hep-exnucl-th

Volume Fluctuation and Autocorrelation Effects in the Moment Analysis of Net-proton Multiplicity Distributions in Heavy-Ion Collisions

Xiaofeng Luo , Ji Xu , Bedangadas Mohanty , Nu Xu This is my paper
classification nucl-ex hep-exnucl-th
keywords analysisdistributionsmomentmultiplicityartifactscollisionseffectsfluctuation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Moments (Variance ($\sigma^2$), Skewness($S$), Kurtosis($\kappa$)) of multiplicity distributions of conserved quantities, such as net-baryon,net-charge and net-strangeness, are predicted to be sensitive to the correlation length of the system and connected to the thermodynamic susceptibilities computed in Lattice QCD and Hadron Resonance Gas (HRG) model. In this paper, we present several measurement artifacts that could lead to volume fluctuation and auto-correlation effects in the moment analysis of net-proton multiplicity distributions in heavy-ion collisions using the UrQMD model. We discuss methods to overcome these artifacts so that the extracted moments could be used to obtain physical conclusions. In addition we present methods to properly estimate the statistical errors in moment analysis.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Nonflow Subtraction Beyond Two-Particle Correlations

    nucl-th 2026-06 unverdicted novelty 7.0

    A nonflow subtraction framework for m-particle cumulants is developed and tested in HIJING simulations for O+O and d+Au collisions.

  2. Search for the QCD Critical Point in High Energy Nuclear Collisions: A Status Report

    nucl-ex 2026-02 accept novelty 2.0

    Recent net-proton cumulant ratios from RHIC BES-II data are compared to non-critical models from Lattice QCD, HRG, hydrodynamics and UrQMD, with volume fluctuation effects noted at fixed-target energies.