In an intermediate-momentum regime where mass effects are significant, heavy quark suppression and anisotropic flow are computed to investigate the transition between the collisional and radiative energy loss. Based on the collision kernel for diffusion, elastic scattering and semi-collinear gluon-bremsstrahlung can be consistently incorporated into a Boltzmann equation that involves the heavy quark diffusion coefficient. Using the running coupling constant and the diffusion coefficient constrained by lattice QCD data, the collisional and radiative energy-loss contributions to the $R_{AA}$ and $v_2$ are studied in hydrodynamically expanding thermal media. The evolution of the observables, the bulk flow effect, and the dependence on mass and centrality are discussed in noncentral heavy-ion collisions.
Nuclear Deformation Effects on Charmonium Suppression in Au+Au and U+U Collisions
Tianjin University(天津大学);Georgia Institute of Technology(佐治亚理工学院);Tianjin University-National University of Singapore Joint Institute in Fuzhou(福州中新联合研究院)
Local Spin Polarization in Anisotropic Gubser Flow: Suppression Mechanism and Formulation Dependence
The University of Tokyo(东京大学);University of Science and Technology of China(中国科学技术大学);Institute of Modern Physics, Chinese Academy of Sciences(中国科学院近代物理研究所)
Effect of an anisotropic escape mechanism on elliptic flow in relativistic heavy-ion collisions
研究了相对论重离子碰撞中各向异性逃逸机制对椭圆流的影响。我们使用Glauber模型来产生初始条件,忽略横向的流体动力膨胀。我们采用Beer-Lambert定律考虑产生的强子在介质中的透射率,并计算由于粒子穿过介质受到抑制而产生的各向异性。为了分离非流动的贡献,由于表面偏压的影响,我们忽略流体动力学的横向方向上的膨胀,并考虑纯粹的纵向助推不变的膨胀。计算了RHIC上$\sqrt{s_{NN}}=200$ GeV Au $+$ Au碰撞和LHC上$\sqrt{s_{NN}}=2.76$ TeV Pb $+$ Pb碰撞中,由于表面偏压效应,各向异性逃逸机制产生的椭圆流对不同中心度的横向动量依赖关系.我们发现表面偏置效应对重离子碰撞中观察到的总椭圆流有相当大的贡献,这表明从流体动力学模拟中提取的QCD物质的粘度可能被低估了。
Spectral Signatures of Heavy Quarkonia in a Rotating and Anisotropic Quark-Gluon Plasma: A Holographic Study
College of Mathematics and Physics, China Three Gorges University(三峡大学数学与物理学院);Center for Astronomy and Space Sciences and Institute of Modern Physics, China Three Gorges University(三峡大学天文与空间科学中心及现代物理研究所)
$T_c$, Photoproduction, Paramagnetic Anisotropic Plasma, IR Log-Gravitational-DBI Renormalization and $G_2$-Structure Induced (Almost) Contact 3-Structures in Hot Strongly Magnetic MQCD at Intermediate Coupling
Indian Institute of Technology Roorkee(印度技术学院鲁尔基分校)