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首页> 外文期刊>Physical review, C >Modeling of charged kaon and neutral kaon fluctuations as a signature for the production of a disoriented chiral condensate in A-A collisions
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Modeling of charged kaon and neutral kaon fluctuations as a signature for the production of a disoriented chiral condensate in A-A collisions

机译：带电Kaon和中性kaon波动的建模作为A-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a碰撞的凝固凝集的签名

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摘要

Anomalous event-by-event fluctuations of the relative yields of neutral (K-s(0)) and charged kaon (K-+/-) have been predicted to yield a signature for the formation of disoriented chiral condensate (DCC) in relativistic heavy-ion collisions. In this work, we model the production and decay of DCCs in the context of heavy-ion collisions at the CERN Large Hadron Collider, and estimate the sensitivity of large acceptance detectors, such as the ALICE detector, towards the identification of such anomalous decays. Our study is based on the robust statistical observable, nu(dyn) , known for its sensitivity to dynamical fluctuations. We first present simulations without DCCs, based on the HIJING and AMPT models, in order to establish an approximate reference for the magnitude of nu(dyn) (K-+/- , K-0) and its centrality evolution in Pb-Pb collisions at the TeV energy scale. We next introduce simple phenomenological models of K-s(0) vs K-+/- event-by-event yield fluctuations, which we use to study the feasibility and sensitivity of detection of the production of DCCs in heavy-ion collisions. Although the precision of models such as HIJING and AMPT limit their use as absolute references and thus render anomalous fluctuations difficult to define precisely, our studies demonstrate that the magnitude of nu(dyn) (K-+/- , K-s(0)) is in fact very sensitive to the presence of small admixture of DCCs in normal non-DCC events. Consequently, while large values of nu(dyn)(K-+/- , K-s(0)) may not be sufficient to identify the existence of DCCs, they nonetheless constitute a first and necessary condition to signal their possible production in heavy-ion collisions.
机译：已经预测了中性相对产量和带电的KaOn（k - + / - ）的异常事件逐次波动，得到了在相对论的重度中形成迷失方向的手性凝结物（DCC）的签名。离子碰撞。在这项工作中，我们在CERN大型强子撞机的重离子碰撞的背景下模拟了DCC的生产和衰减，并估算了大型验收探测器（例如Alice检测器）朝向鉴定这种异常衰减的敏感性。我们的研究基于稳健的统计观察，Nu（DYN），以其对动态波动的敏感性而闻名。我们首先在没有DCC的情况下，基于HEIRE和AMPT模型，为NU（DYN）（K - + / - ，K-0）的大致参考，以及其在PB-PB碰撞中的近似参考在TEV能量规模。我们接下来引入简单的K-S（0）VS K - + / - 逐个事件产量波动的简单现象学模型，我们用于研究检测在重离子碰撞中DCC的生产的可行性和敏感性。虽然诸如HEIGE和AMPT等模型的精确度限制了它们作为绝对参考的使用，因此难以准确地定义异常波动，但我们的研究表明nu（dyn）（k - + / - ，ks（0））的大小是事实上，对正常的非DCC事件中的DCC的小混合物非常敏感。因此，虽然Nu（DYN）的大值（K - + / - ，ks（0））可能不足以识别DCC的存在，但它们仍然构成了发出重离子中可能产生的第一和必要条件碰撞。

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