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首页> 外文期刊>Journal of Physics, G. Nuclear and Particle Physics: An Institute of Physics Journal >Volume fluctuation and auto-correlation effects in the moment analysis of net-proton multiplicity distributions in heavy-ion collisions
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Volume fluctuation and auto-correlation effects in the moment analysis of net-proton multiplicity distributions in heavy-ion collisions

机译:重离子碰撞中净质子多重分布矩分析中的体积波动和自相关效应

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摘要

Moments (variance (σ~2), skewness (S), kurtosis (κ)) 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 the Lattice QCD and Hadron Resonance Gas 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 ultra-relativistic quantum molecular dynamics model. We discuss methods to overcome these artifacts so that the extracted moments can be used to obtain physical conclusions. In addition, we present methods to properly estimate the statistical errors in moment analysis.
机译:守恒量的多重分布(如净重子,净电荷和净奇异性)的矩(方差(σ〜2),偏度(S),峰度(κ))预计对分子的相关长度敏感。该系统并与在莱迪思QCD和强子共振气体模型中计算出的热力学敏感性相关。在本文中,我们提出了几种测量伪影,这些伪影在使用超相对论量子分子动力学模型分析重离子碰撞中的净质子多重分布的矩时可能会导致体积波动和自相关效应。我们讨论了克服这些伪影的方法,以便可以将提取的矩用于获得物理结论。另外,我们提出了在矩量分析中正确估计统计误差的方法。

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