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首页> 外文期刊>Physical review, C >Probing hot and dense nuclear matter with K*, (K)over-bar* vector mesons
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Probing hot and dense nuclear matter with K*, (K)over-bar* vector mesons

机译：用k *，（k）过度尺寸探测耐热和致密核物质*矢量介子

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We investigate the possibility of probing the hot and dense nuclear matter-created in relativistic heavyion collisions (HICs)-with strange vector mesons (K*, (K) over bar*). Our analysis is based on the nonequilibrium parton-hadron-string dynamics (PHSD) transport approach which incorporates partonic and hadronic degrees of freedom and describes the full dynamics of HIC on a microscopic level-starting from the primary nucleon-nucleon collisions to the formation of the strongly interacting quark gluon plasma (QGP), followed by dynamical hadronization of (anti)quarks as well as final hadronic elastic and inelastic interactions. This allows us to study the K* and (K) over bar* meson formation from the QGP as well as the in-medium effects related to the modification of their spectral properties during the propagation through the dense and hot hadronic environment in the expansion phase. We employ relativistic Breit-Wigner spectral functions for the K*, (K) over bar* mesons with self-energies obtained from a self-consistent coupled-channel G-matrix approach to study the role of in-medium effects on the K* and (K) over bar* meson dynamics in heavy-ion collisions from FAIR/NICA to LHC energies. According to our analysis most of the final K* /(K) over bar*'s, that can be observed experimentally by reconstruction of the invariant mass of pi + K((K) over bar) pairs, are produced during the late hadronic phase and originate dominantly from the K((K) over bar) + pi - K*( (K) over bar*) formation channel. The amount of K*/ (K) over bar*'s, originating from the QGP channel is comparatively small even at LHC energies and those K* /(K) over bar*'s can hardly be reconstructed experimentally due to the rescattering of final pions and (anti)kaons. This mirrors the results from our previous study on the strange vector-meson production in heavy-ion collisions at RHIC energies. We demonstrate that K* /(K) over bar* in-medium effects should be visible at FAIR/NICA and BES RHIC energies, where the production of K* /(K) over bar*'s occurs at larger net-baryon densities. Finally, we present the experimental procedures to extract the information on the resonance masses and widths by fitting the final mass spectra at LHC energies.
机译：我们调查探测在相对论的钢铁碰撞（HICS）中创建的热和密集核物质（HICS）的可能性 - 奇怪的矢量介子（K *，（k）上方的酒吧*）。我们的分析基于非QuiBiRibrium Parton-Holdron-String动态（PHSD）传输方法，其包含局部和分列的自由度，并描述了从主要核子核聚核核碰撞到形成的微观水平开始的HIC的完整动态强烈相互作用的夸克胶质等离子体（QGP），其次是（抗）夸克的动态脱龙，以及最终的辐射弹性和非弹性相互作用。这使我们能够通过QGP研究K *和（K）k *和（k）从QGP中形成MESON形成，以及通过膨胀阶段的致密和热的强力环境在传播过程中改变其光谱性质的中等效果。我们采用了K *，（k）上的相对论的Breit-Wigner谱函数，通过杆*偏离自信耦合通道G-矩阵方法获得的自体能量来研究中等效应对K *的作用（k）在Bare / Nica到LHC Energies的重离子碰撞中的Bar * Meson Dynamics。根据我们的分析，通过重新重新分析的重新重新分析，通过重新重新调整，通过重新重新调整，通过重新重构产生的大多数最终K * /（k），这可以通过重建Pi + k（（k）上的Pi + k（（k））。从K（（k）上方的k（（k）上方）相位和源自阶段，+ pi - ＆ k *（（k）上方栏*）形成频道。源自QGP通道的k * /（k）的量即使在LHC能量上也比在LHC能量上相对小，并且由于振振了最后的π和（反）kons。这反映了我们以前关于在RAC Energies的重离子碰撞中的奇怪载体培养生产研究的研究结果。我们证明，在展会/奈卡和流行能量上，k * /（k）k * /（k）k * /（k）k * /（k）应在展会/奈卡和流行能量中可见，其中k * /（k）在较大的净细胞密度下发生K * /（k） 。最后，我们介绍了通过在LHC能量下拟合最终质量光谱来提取有关共振质量和宽度的信息的实验程序。

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