论文标题
高能重型离子碰撞中喷气机中魅力夸克的径向分布
Radial distribution of charm quarks in jets in high-energy heavy-ion collisions
论文作者
论文摘要
高能重型离子碰撞中的浓风味物理是研究RHIC和LHC上“喷射淬火”效应的质量依赖性的一个有前途且活跃的领域。在本次演讲中，我们介绍了有关$ d^0 $ MESON径向分布相对于p+p和pb+pb碰撞的$ \ sqrt {s_ {nn}} = 5.02 $ tev的$ d^0 $ meson radial分布，在我们与实验数据的结果中达成了不错的协议。蒙特卡洛运输模型描述了中等内部的part顿繁殖，该模型使用近代领先顺序（NLO）加Parton淋浴（PS）事件发生器Sherpa作为输入，包括弹性（碰撞）和无弹性（辐射）（辐射）（辐射）重型风味射流中的中等体内相互作用。我们发现，在低$ d^0 $中，梅森$ p_t $，径向分布显着转移到较大的半径，表明具有强大的扩散效果，而扩散效应随$ p_t $迅速降低，这与最近的CMS测量结果一致。我们证明了魅力夸克的角度偏差对$ d_s $而不是$ \ hat {q} $敏感，这可能会对碰撞和辐射性重型夸克能量损失提供新的约束。
Heavy flavor physics in high-energy heavy-ion collisions is a promising and active area to study the mass dependence of the "jet quenching" effects both at the RHIC and the LHC. In this talk, we present the first theoretical study on the $D^0$ meson radial distributions relative to the jet axis both in p+p and Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV, where a nice agreement of our results with experimental data is observed. The in-medium parton propagations are described by a Monte Carlo transport model which uses the next-to-leading order (NLO) plus parton shower (PS) event generator SHERPA as input and includes elastic (collisional) and inelastic (radiative) in-medium interaction of heavy flavor jet. We find that, at low $D^0$ meson $p_T$, the radial distribution significantly shifts to larger radius indicating a strong diffusion effect, and the diffusion effects decrease quickly with $p_T$ ,which is consistent with the recent CMS measurements. We demonstrate that the angular deviation of charm quarks is sensitive to $D_s$ but not $\hat{q}$, which may provide new constrains on the collisional and radiative heavy quark energy loss.
