共查询到19条相似文献,搜索用时 171 毫秒
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用在电磁等离子体中广泛证明有效的导数展开法求解夸克胶子等离子体动力论方程,发现场方程的自作用项对夸克胶子等离子体的非Abelian激发的非线性频移具有非常重要的影响.求解到第三阶,得到了包含胶子自耦合作用的非线性频移的解析表达式,并给出了k=0模式的纯胶子气的非线性频移的数值解. 相似文献
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建立了夸克胶子等离子体中胶子的经典输运方程, 并讨论了它与胶子的量子输运方程以及它与夸克的经典输运方程之间的关系. 相似文献
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给出了一种超越阿贝尔优势近似求解夸克胶子等离子体输运方程的方法,并用它计算了夸克、反夸克等离子体的输运系数,讨论了输运系数的非阿贝尔修正. 相似文献
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本文对球形演化的夸克–胶子等离子体膨胀源进行了2π干涉学分析.夸克–胶子等离子体的演化由相对论流体力学和熵密度的物态方程描述,而2πHanbury-Brown-Twiss(HBT)关联函数由量子几率振幅的路径积分公式计算.研究结果表明,由2π干涉学得到的源的空间参量敏感地依赖于π介子发射源的相空间分布,源的膨胀速度导致HBT半径变小,并会改变HBT半径与冻结温度之间的关系. 相似文献
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基于相对论性流体力学,我们计算了在极端相对论性原子核碰撞中形成的高温高密夸克-胶子等离子体在衰变过程中产生的特征双轻子谱.我们不但考虑了物质的伴随横向膨胀的纵向膨胀,而且也首先在用相对论性流体力学方程描述膨胀过程时考虑了相变的影响.计算结果已预言,当夸克-胶子等离子体存在时展示的特征现象,从而为实验提供了理论依据. 相似文献
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It is shown that the non-Abelian properties? of QGP can be got by studying the kinetic equations for QGP beyond the linear response theory. The non-Abelian interaction of the eigenmodes in QGP is found and two quantities describing the non-Abelian properties of QGP are given. 相似文献
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The production of dileptons in the intermediate mass region in QGP has been studied on the basis of a relativistic hydrodynamic model. Due to the influence of the phase boundary on the evolution of the QGP system and the high initial temperature of the QGP produced at RHIC energies, the quark phase contribution is much more important than that from hadronic interactions and even comparable with that from background sources. It is shown that such an enhancement is a signature for the QGP formation. 相似文献
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Prospects of measuring polarized photons emitted from a quark–gluon plasma (QGP) are discussed. In particular, the detection of a possible quark spin polarization in a QGP using circularly polarized photons emitted from the plasma is studied. Photons leave the QGP without further interaction and thus provide a primary probe for quark polarization within the QGP. We find that photon polarization cannot solely arise due to a possible QGP momentum space anisotropy, but may be enhanced due to it. In particular, for oblate momentum distributions and high photon energies, quark polarization is efficiently transfered to photon polarization. The role of competing sources of polarized photons in heavy-ion collisions is discussed. 相似文献
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Study of Quark-Gluon plasma (QGP) has been a very active area of research in high energy physics since last four decades.
This article gives an elementary introduction to QGP. It covers the motivation to study QGP, its abundance in nature, experimental
status, production mechanism, signatures and modelling dynamics. We have discussed the medium effects in QGP in terms of response
functions, heavy quark potential and Landau damping. Some other recent approaches are also discussed. 相似文献
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The refractive index (RI) of light propagating in a medium of quark-gluon plasma (QGP) is studied. The weakly coupled QGP is studied in the framework of hard-thermal-loop (HTL) perturbation theory, and the strongly coupled one is treated based on the holographic approach. In more realistic setups, the feasibility of observing the optical phenomenon related to the RI of QGP is also discussed. 相似文献
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Recent trends in the research of quark gluon plasma (QGP) are surveyed and the current experimental and theoretical status
regarding the properties and signals of QGP is reported. We hope that the experiments commencing at relativistic heavy-ion
collider (RHIC) in 2000 will provide a glimpse of the QGP formation. 相似文献
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Vector bosons become accessible experimental probes in heavy-ion collisions at the LHC. The capabilities of the LHC experiments
to perform their measurement are outlined. The focus is given to their utility to study the possible formation and properties
of the Quark Gluon Plasma (QGP) in the most central heavy-ion collisions. Their own sensitivity (if any) to the QGP is discussed.
Their interest as references to observe multiple QGP sensitive probes is justified. 相似文献
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介绍和评述了欧洲核子研究中心(CERN)的相对论重离子碰撞的重要实验结果及其物理解释。碰撞初期形成了高温高密系统。能量密度达到了产生夸克胶子等离子体(QGP)的阈值,低质量双轻子增长、J/ψ反常压低和奇异粒子增长等实验现象可以用形成了QGP来解释。但目前的实验还不足以证明已经产生了QGP。 相似文献
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Chen Xiangjun 《International Journal of Theoretical Physics》2003,42(8):1787-1793
The thermodynamic potential of quark-gluon plasma (QGP) in equilibrium state is calculated by finite temperature QCD. The pressure correction of QGP and the critical temperature correction of deconfinement phase transition of hadron are discussed. 相似文献