论文标题
关于爱丽丝的硬质和稀有探针的最新结果
Recent results on hard and rare probes from ALICE
论文作者
论文摘要
在高能强化碰撞中，具有较大动量转移的硬性零食散射是形成硬质和稀有探针的先决条件。在重型离子碰撞中，这些探针 - 与早期硬合作派散射有关的最终状态颗粒 - - 作为探索包括夸克 - 斑点血浆（QGP）阶段在内的介质演变的强大工具。质子 - 蛋白质（PP）碰撞测试的硬探针测试扰动量子染色体动力学（PQCD）过程和强壮的过程，并为核碰撞系统提供了参考。高多重PP碰撞为重型离子碰撞提供了巨大的事件活动，这为其提供了巨大的事件活动。 含有至少一个魅力或美容夸克的重风味黑龙属于硬质和稀有探针。最近，爱丽丝（Alice）测量了一大堆重型流风光的调色板，可以使魅力碎片更加明显。 charmon量的测量结果与事件多样性的关系可以洞悉charmon生产过程与驱动多样性的软过程之间的相互作用。爱丽丝（Alice）调查了j/$ψ$生产在中期的多样性依赖性，而$ψ\ rm（2s）$与j/$ψ$的收益率的比率为远期快速。魅力和美容横截面可以通过蒙特卡洛发生器的拟合来限制测得的Dielectron Continuum。
In high-energy hadronic collisions, hard parton scatterings with large momentum transfers are prerequisites for the formation of hard and rare probes. In heavy-ion collisions, these probes---final state particles related to the early hard-parton scatterings---serve as a powerful tool to explore the whole evolution of the medium including the quark--gluon plasma (QGP) stage. Hard probes in proton-proton (pp) collisions test perturbative quantum chromodynamics (pQCD) processes and hadronization, and provide a reference for the nuclear collision systems. High-multiplicity pp collisions provide a bridge to heavy-ion collisions, due to their large event activity. Heavy-flavor hadrons containing at least one charm or beauty quark belong to the hard and rare probes. Recently, ALICE has measured a broad palette of heavy-flavour baryons allowing to shed more light on charm fragmentation. Measurements of charmonium production as a function of the event multiplicity can provide insight into the interplay between charmonium-production processes and soft processes driving the multiplicity. ALICE has investigated the multiplicity dependence of J/$ψ$ production at midrapidity and the ratio of $ψ\rm (2S)$ to J/$ψ$ yields at forward rapidity. The charm and beauty cross sections can be constrained by fits of Monte-Carlo generators to the measured dielectron continuum.
