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arXiv 0906.0630nucl-ex
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$\sqrt{s_{NN}}$ = 9.2 GeV Au+Au碰撞的STAR实验的最新结果

Recent results from STAR experiment in Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV

Debasish Das

摘要:

理论模型表明,量子色动学(QCD)相图有一个临界点,划分了两个相之间的跃迁顺序:强子气体,夸克被限制在其中,夸克-胶子等离子体(QGP)。相对论性重离子碰撞实验的中心目标是创造和研究这种被称为QGP的物质形式,并理解QCD相图。在RHIC(相对论重离子对撞机)的能量扫描计划,我们计划探索这一令人兴奋的物理可能性使用重离子碰撞在不同的质心能量的星(螺线管跟踪器在RHIC)探测器是相关的。第一次测试运行与金+金碰撞在$\sqrt{s_{NN}}$ = 9.2 GeV发生在2008年初。我们提出了最近的STAR结果,从这次运行的识别粒子(π介子,K介子和质子)的横动量谱和比率。此外,我们将提出和讨论的方位角各向异性参数($v_{1}$,$v_{2}$)的结果以及π干涉测量。这些最近从金+金碰撞在$\sqrt{s_{NN}}$ = 9.2 GeV的结果进行了比较与其他SPS和RHIC测量。

英文摘要:

Theoretical models suggest that the Quantum Chromo-Dynamics (QCD) phase diagram has a critical point demarcating the order of transition between the two phases: the hadron gas, in which the quarks are confined and the Quark-Gluon Plasma (QGP). The central goal of the experiments with relativistic heavy-ion collisions is to create and study such form of matter called the QGP and understand the QCD phase diagram. The STAR (Solenoidal Tracker At RHIC) detector is pertinent for the RHIC (Relativistic Heavy Ion Collider) energy scan program where we plan to explore this exciting physics possibility using heavy-ion collisions at various center of mass energies. A first test run with Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV took place in early 2008. We present the recent STAR results from this run of the identified particles (pion, kaon and proton) transverse momentum spectra and ratios. Also we shall present and discuss the results of the azimuthal anisotropy parameters ($v_{1}$, $v_{2}$) along with the pion interferometry measurements. These recent results from Au+Au collisions at $\sqrt{s_{NN}}$ = 9.2 GeV are compared with other SPS and RHIC measurements.

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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