Using the technique of quantum transport of the interfering pair we examine the Hanbury-Brown-Twiss (HBT) interferometry signatures for the particle-emitting sources of pions and kaons produced in the heavy ion collisions at GSI-FAIR energies. The evolution of the sources is described by relativistic hydrodynamics with the system equation of state of the first-order phase transition from quark-gluon plasma (QGP) to hadronic matter. We use quantum probability amplitudes in a path-integral formalism to calculate the two-particle correlation functions, where the effects of particle decay and multiple scattering are taken into consideration. We find that the HBT radii of kaons are smaller than those of pions for the same initial conditions. Both the HBT radii of pions and kaons increase with the system initial energy density. The HBT lifetimes of the pion and kaon sources are sensitive to the initial energy density. They are significantly prolonged when the initial energy density is tuned to the phase boundary between the QGP and mixed phase. This prolongations of the HBT lifetimes of pions and kaons may likely be observed in the heavy ion collisions with an incident energy in the GSI-FAIR energy range.
Accessing baryon to meson transition distribution amplitudes in meson production in association with a high invariant mass lepton pair at GSI-FAIR with PANDA
Strange meson-baryon interaction in hot and dense medium: recent progress for a road to GSI/FAIR
本文报道了在GSI/FAIR和NICA-Dubna上进行的与重离子碰撞中近阈产生有关的两体反应中奇异强子动力学的最新研究结果。特别是,$\bar K N$散射热和密集的核物质的手征单一的框架内的耦合通道进行了研究,建立在微观离壳运输方法的实施的起点。我们着重于跃迁率的计算,特别注意超子共振和同位旋效应的激发。此外,我们探讨了“非常规”的奇异介子介子和介子重子相互作用与最近的深亚阈值$ϕ$和$Ξ$生产的HADES观测。
Exclusive scalar $f_0(1500)$ meson production for energy ranges available at the GSI Facility for Antiproton and Ion Research (GSI-FAIR) and at the Japan Proton Accelerator Research Complex (J-PARC)
我们计算了$p \bar p \to N_1 N_2 f_0$(FAIR@GSI)和$p p \to p p f_0$(J-PARC@Tokai)的纯量$f_0(1500)$介子(胶球候选者)产生的微分分布。首次计算了QCD衍射、π介子-π介子交换流(MEC)分量以及具有中间π介子环的双衍射机制。可以可靠地计算的π介子-π介子分量在接近阈值时占主导地位,而衍射分量可能仅在较大能量时才占主导地位。目前只能得到QCD衍射分量的上限。衍射分量的计算是基于双胶子影响因子以及Khoze-Martin-Ryskin方法的框架下提出的衍射希格斯玻色子玻色子的生产。不同的未积分胶子分布函数(UGDFs)从文献中使用。相当大的截面,由于π介子融合的PANDA能量,胶子机制被证明是可以忽略不计的预测。接近阈值的$f_0(1500)$的产生会限制所谓的$πNN$形状因子在更大的π虚拟区域。我们详细讨论了产生$f_0(1500)$介子的两π介子背景。我们将我们的结果与WA 102合作组织的现有数据进行了比较。
GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI亥姆霍兹重离子研究中心);Institute for Theoretical Physics, Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany(法兰克福歌德大学理论物理研究所);Helmholtz Research Academy Hessen for FAIR (HFHF)(黑森亥姆霍兹FAIR研究院);SUBATECH UMR 6457 (IMT Atlantique, Université de Nantes, IN2P3/CNRS)(南特大学/大西洋高等矿业学院/法国国家科学研究中心IN2P3 SUBATECH联合实验室);Frankfurt Institute for Advanced Studies(法兰克福高级研究所)
Extension of the integrated hydrokinetic model to nuclear collision energies relevant for the RHIC Beam-Energy Scan program and the research program at GSI-FAIR
Exclusive scalar glueball $f_0(1500)$ production for FAIR and J-PARC energy range
我们评估了$p \bar p \to N_1 N_2 f_0$(FAIR@GSI)和$p p \to p p f_0$(J-PARC@Tokai)的排他性标量$f_0(1500)$生产的差分分布。QCD衍射和π-π介子交换流(MEC)的分量都包括在内。预计会有相当大的截面。在文献中从未讨论过的π介子-π介子分量在接近阈值时占主导地位,而衍射分量则在更大的能量下占据主导地位。衍射分量的计算是基于双胶子影响因子以及Khoze-Martin-Ryskin方法的框架下提出的衍射希格斯玻色子玻色子的生产。不同的未积分胶子分布函数(UGDFs)从文献中使用。接近阈值的$f_0(1500)$的产生会限制所谓的$πNN$形状因子在更大的π虚拟区域中。
Charmonium production in p+A collisions at SPS and FAIR energies
GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI亥姆霍兹重离子研究中心);Institute for Theoretical Physics, Johann Wolfgang Goethe Universität(约翰·沃尔夫冈·歌德大学理论物理研究所);Helmholtz Research Academy Hessen for FAIR (HFHF)(黑森FAIR亥姆霍兹研究学院);SUBATECH UMR 6457 (IMT Atlantique, Université de Nantes, IN2P3/CNRS)(SUBATECH UMR 6457(大西洋高等矿业学院、南特大学、IN2P3/CNRS));Frankfurt Institute for Advanced Studies(法兰克福高等研究院)
QCD analysis of bar p N -> gamma* pi in the scaling limit
本文研究了核子-反核子湮灭成深虚光子和介子的标度机制,pN-> gamma* pi。我们得到了运动学区域中的主导扭转振幅,在此振幅分解为反质子分布振幅、与核子形状因子相关的短程矩阵元和描述核子-介子跃迁的长程主导跃迁分布振幅。我们给出了这些跃迁分布振幅的Q^2演化方程。这一过程的截面的定标可以在拟议的GSI强反质子束设施FAIR上用PANDA或PAX探测器进行测试。我们评论相关的过程,如π N -> N'伽玛 * 和伽玛 * N -> N' π,这可能是实验研究在强介子束设施和JLab或Hermes,分别。
Double handbag description of proton-antiproton annihilation into a heavy meson pair
我们提出在微扰QCD框架下描述过程$ p \bar{p} \,\to\, \bar{D^0} D^0$,其中双手提袋硬过程$ u d \bar u \bar d \to \bar{c} c$由跃迁分布振幅分解,跃迁分布振幅是$Ψ_q Ψ_q Ψ_c $算符的准前向强子矩阵元,其中q表示轻夸克,c表示重夸克.我们主张粲夸克质量作为允许这种因子分解的大尺度。我们在标量双夸克模型的简化框架下计算了这一过程,并给出了GSI-FAIR的PANDA实验的预期截面。