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arXiv 1702.02028hep-phnucl-th
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QCD临界点附近的多重性波动

Multiplicity fluctuations near the QCD critical point

Maurício Hippert, Eduardo S. Fraga

摘要:

重离子碰撞实验中粒子多重数的统计矩是探索强相互作用物质相图,特别是寻找QCD临界终点的重要工具。然而,为了恰当地解释这些时刻的实验测量,有必要了解实验限制的作用,以及背景贡献,提供对关键行为应如何受其影响的预期。在这里,我们提出了一个框架,计算时刻的粒子多重性的关键和虚假的起源相关的存在。我们还包括共振衰减和有限的接受窗口,以及检测器效率的影响。虽然我们关注的是二阶矩,但为了简单起见,对高阶矩的扩展是直接的。

英文摘要:

Statistical moments of particle multiplicities in heavy-ion collision experiments are an important probe in the exploration of the phase diagram of strongly interacting matter and, particularly, in the search for the QCD critical end point. In order to appropriately interpret experimental measures of these moments, however, it is necessary to understand the role of experimental limitations, as well as background contributions, providing expectations on how critical behavior should be affected by them. We here present a framework for calculating moments of particle multiplicities in the presence of correlations of both critical and spurious origins. We also include effects from resonance decay and a limited acceptance window, as well as detector efficiency. Although we focus on second-order moments, for simplicity, an extension to higher-order moments is straightforward.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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