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首页> 外文期刊>Physical review, C >Higher moments of multiplicity fluctuations in a hadron-resonance gas with exact conservation laws
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Higher moments of multiplicity fluctuations in a hadron-resonance gas with exact conservation laws

机译：具有精确的保护法的强子共振气体中多样性的多样性波动

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摘要

Higher moments of multiplicity fluctuations of hadrons produced in central nucleus-nucleus collisions are studied within the hadron-resonance gas model in the canonical ensemble. Exact conservation of three charges, baryon number, electric charge, and strangeness is enforced in the large volume limit. Moments up to the fourth order of various particles are calculated at CERN Super Proton Synchrotron, BNL Relativistic Heavy Ion Collider (RHIC), and CERN Large Hadron Collider energies. The asymptotic fluctuations within a simplified model with only one conserved charge in the canonical ensemble are discussed where simple analytical expressions for moments of multiplicity distributions can be obtained. Moments products of net-proton, net-kaon, and net-charge distributions in Au + Au collisions at RHIC energies are calculated. The pseudorapidity coverage dependence of net-charge fluctuation is discussed.
机译：在正则系综的强子共振气体模型中，研究了中心核-核碰撞产生的强子多重数涨落的高阶矩。三个电荷、重子数、电荷和奇异性的精确守恒在大体积极限下被强制执行。在CERN超级质子同步加速器、BNL相对论重离子对撞机（RHIC）和CERN大型强子对撞机上计算了各种粒子的四阶矩。讨论了正则系综中只有一个守恒电荷的简化模型中的渐近涨落，得到了多重数分布矩的简单解析表达式。计算了RHIC能下Au+Au碰撞中净质子、净kaon和净电荷分布的矩积。讨论了净电荷涨落对伪快度覆盖率的依赖性。

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