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首页> 外文期刊>Physical review, C >Testing of the coalescence mechanism in high energy heavy ion collisions using two-particle correlations with identified particle trigger
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Testing of the coalescence mechanism in high energy heavy ion collisions using two-particle correlations with identified particle trigger

机译：使用与识别的粒子触发的双粒子相关性的高能量重离子碰撞中的聚结机构的测试

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摘要

In central Au-Au collisions at top RHIC energy, two-particle correlation measurements with identified hadron trigger have shown attenuation of near-side proton triggered jetlike yield at intermediate transverse momentum (p(T)), 2 < p(T) < 6 GeV/c. The attenuation was attributed to the anomalous baryon enhancement observed in the single inclusive measurements at the same p(T) range. The enhancement was found to be in agreement with the models invoking coalescence of quarks as a mechanism of hadronization. Baryon enhancement was also observed at LHC in the single inclusive spectra. We study the consequence of such an enhancement on two-particle correlations at LHC energy within the framework of a multiphase transport (AMPT) model that implements quark coalescence as a mode of hadronization. In this paper we have calculated the proton over pion ratio and the near side per trigger yield associated with pion and proton triggers at intermediate p(T) from the string melting (SM) version of AMPT. Results obtained are contrasted with the AMPT default (Def.) which does not include coalescence. Baryon enhancement was observed in AMPT SM at intermediate p(T). Near-side jetlike correlated yield associated with baryon ( proton) trigger in the momentum region where baryon generation is enhanced is found to be suppressed as compared to the corresponding yields for the meson (pion) trigger in most central Pb-Pb events. No such effect was found in the default version of AMPT.
机译：在顶部Rhir能量的中央Au-Au碰撞中，具有识别的强子触发的双粒子相关测量表明，在中间横向动量（p（t）），2 （t）<6中的近侧质子触发喷射产量的衰减显示gev / c。衰减归因于在相同P（t）范围的单个可包裹测量中观察到的异常骨折增强。发现增强与调用夸克聚结的模型作为一种结名机制。在单一包容光谱中也观察到屈光顿增强。我们研究了在多相传输（AMPT）模型的框架内提高LHC能量的两种粒子相关性的结果，该模型将Quark Cleapence的模式实现为消退模式。在本文中，我们已经计算出质子上的比率和与磁线P（t）的磁共振和质子触发的每触发率的近侧，从弦熔化（SM）版本的AMPT。获得的结果与不包括聚结的ampt默认（def。）对比。在中间p（t）的AMPT SM中观察到屈光顿增强。与大多数中央PB-PB事件中的MESON（PION）触发相应的相应产量相比，发现与BARIN（质子）触发的近侧喷射相关产率在增强了BARYON生成的动量区域中。在ampt的默认版本中没有找到这种效果。

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