Searching for onset of deconfinement via hypernuclei and baryon-strangeness correlations

Searching for onset of deconfinement via hypernuclei and baryon-strangeness correlations
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通过超核和重子奇异性相关性寻找解禁闭的开始

DOI:
10.1016/j.physletb.2010.01.034
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发表时间:
2009-08
期刊:
影响因子:
4.4
通讯作者:
Xu, Z.B.
Xu, Z.B.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, S.;Chen, J.H.;Crawford, H.;Keane, D.;Ma, Y.G.;Xu, Z.B.

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我们认为S3=HΛ3/(He3×Λp)是重子数与奇异性之间局域关联的一个很好的表示,因此是探索高能重离子碰撞中产生的致密物质:夸克胶子等离子体或强子气体的一个有价值的工具。多相输运模型(AMPT)和动力学聚结模型被用来解释我们的论点。我们发现,带弦熔化的AMPT预言了S3随着束流能量的增加而增加,并与实验数据相一致,而仅有强子散射的AMPT在从AGS到RHIC的整个能量范围内都产生了低的S3,不能描述实验数据。
We argue that the ratio S3=HΛ3/(He3×Λp) is a good representation of the local correlation between baryon number and strangeness, and therefore is a valuable tool to probe the nature of the dense matter created in high energy heavy-ion collisions: quark gluon plasma or hadron gas. A multiphase transport model (AMPT) plus a dynamical coalescence model is used to elucidate our arguments. We find that AMPT with string melting predicts an increase of S3with increasing beam energy, and is consistent with experimental data, while AMPT with only hadronic scattering results in a low S3throughout the energy range from AGS to RHIC, and fails to describe the experimental data.
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