Baryon-strangeness correlation in quark combination models
Baryon-strangeness correlation in quark combination models
复制标题
夸克组合模型中的重子-奇异性相关性
DOI：
10.1103/physrevc.92.044913
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发表时间：
2015-05
影响因子：
3.1
通讯作者：
Rui-qing Wang
中科院分区：
文献类型：
--
作者：
Feng-lan Shao;Jun Song;Rui-qing Wang
在夸克组合机制下研究了夸克物质强子化中的重子奇异关联。我们计算了由$C^{（q）}_{BS}=1$的退禁闭自由夸克系统产生的初始强子的相关系数$C_{BS} =-3\big（\langle B S \rangle-\langle B S\rangle\big）/\big（\langle S^2 \rangle-\langle S\rangle^2\big）$.在强子化过程中，重子与介子的竞争产生是影响重子奇异关联变化的关键动力学。泊松统计下的夸克组合结果与强子共振气体在化学势为零时的统计模型预测一致，但与化学势较大时的结果不同。超出泊松统计的结果也得到了比较与晶格QCD在相边界的计算，在温度$T =163$ MeV的最佳协议。我们预言了强子系统的C_{BS}$与重子化学势和奇异度的关系。这些预测预计将通过未来的晶格QCD计算在非零化学势和/或在RHIC的星星合作的束能量扫描实验进行测试。
The baryon-strangeness correlation in the hadronization of the quark matter is studied within the quark combination mechanism. We calculate the correlation coefficient $C_{BS} = -3\big(\langle B S \rangle -\langle B\rangle \langle S\rangle\big)/\big( \langle S^2 \rangle-\langle S \rangle^2 \big)$ of initial hadrons produced from the deconfined free quark system with $C^{(q)}_{BS}=1$. The competition of the production of baryons against that of mesons is the key dynamics that is most relevant to the change of baryon-strangeness correlation during system hadronization. Results of quark combination under the Poisson statistics agree with the statistical model predictions for a hadron resonance gas at vanishing chemical potential but differ from those at relatively large chemical potentials. Results beyond Poisson statistics are also obtained and are compared with calculations of Lattice QCD in the phase boundary, giving the best agreement at temperature $T =163$ MeV. We predict the dependence of the $C_{BS}$ of hadron system on the baryon chemical potential and strangeness. These predictions are expected to be tested by the future Lattice QCD calculations at non-zero chemical potentials and/or by the Beam Energy Scan experiment of STAR Collaboration at RHIC.
DOI：
10.1142/5029
发表时间：
2004
期刊：
--
影响因子：
--
作者：
R. Hwa;Xin-Nian Wang
通讯作者：
R. Hwa;Xin-Nian Wang