Resonances from PHSD
Resonances from PHSD
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来自 PHSD 的共鸣
DOI：
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发表时间：
2012
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影响因子：
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通讯作者：
E. Bratkovskaya
中科院分区：
文献类型：
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作者：
E. Bratkovskaya
用部分强子-强子弦动力学(PHSD)方法研究了相对论核-核碰撞中多奇异重子和矢量介子的共振产生，该方法结合了强相互作用准粒子(夸克和胶子)的显式部分子自由度和晶格QCD的状态方程，以及反应末期的动力学强子化和强子碰撞动力学.我们发现，在SPS能区，部分子相对多奇异反重子的产生有显著的影响，这是因为在强子化过程中，大量类时间胶子衰变产生的S S对略有增加，并且形成了更大的反重子。此外，从SIS到SPS能区的动力学矢量介子谱函数，我们在低质量双轻子区获得了可见的介质内效应，而在RHIC和LHC能区，这种介质效应变得更为温和。在1.1-3GeV的中等质量范围内，在超种强子(多介子)通道的SPS能区以及相关和不相关的半轻子D介子衰变的SPS能区发现了明显的部分子自由度痕迹。从强相互作用夸克-胶子-等离子体(SQGP)产生的双轻子在最高的SPS能量下已经可见，在RHIC和LHC能量下更加明显。
The multi-strange baryon and vector meson resonance production in relativistic nucleus-nucleus collisions is studied within the parton-hadron- string dynamics (PHSD) approach which incorporates explicit partonic degrees- of-freedom in terms of strongly interacting quasiparticles (quarks and gluons) in line with an equation-of-state from lattice QCD as well as the dynamical hadronization and hadronic collision dynamics in the final reaction phase. We find a significant effect of the partonic phase on the production of multi-strange antibaryons at SPS energies due to a slightly enhanced s¯ s pair production from massive time-like gluon decay and a larger formation of antibaryons in the hadronization process. We, futhermore, obtain a visible in-medium effects in the low mass dilepton sector from dynamical vector-meson spectral functions from SIS to SPS energies whereas at RHIC and LHC energies such medium ef- fects become more moderate. In the intermediate mass regime from 1.1 to 3 GeV pronounced traces of the partonic degrees of freedom are found at SPS energies which superseed the hadronic (multi-meson) channels as well as the correlated and uncorrelated semi-leptonic D-meson decays. The dilepton production from the strongly interacting quark-gluon-plasma (sQGP) becomes already visible at top SPS energies and more pronounced at RHIC and LHC energies.