论文标题
通过PP中的介电和PB碰撞与LHC的PP碰撞测量重量夸克
Measurement of heavy-quark production via dielectrons in pp and p-Pb collisions with ALICE at the LHC
论文作者
论文摘要
重夸克是研究在LHC的重离子碰撞中产生的夸克 - 胶状等离子体（QGP）的特性的有用探针，因为它们是在初始硬散射过程中产生的。要挑出QGP特征的信号，了解真空中原始的重夸克产生并使热核物质效应的热效果至关重要。此外，对高多重PP和P-PB碰撞中集体效应的观察表明，与重型离子碰撞中的相似之处令人惊讶。这种碰撞中的重量生产可以进一步了解基本过程。可以使用$ \ rm e^{+} e^{ - } $对重的半蛋白质衰变的重型粉丝对重的生产进行研究。与单个重型流动测量值相比，二元发电率包含有关魅力和抗charm夸克之间初始运动学相关性的信息，否则这些夸克是无法访问的，并且对软性重型燃料产生敏感。我们报告了相关的结果$ \ rm e^{+} e^{ - } $对PP碰撞中的$ collisions记录在不同的碰撞能量上。通过比较重氟强生衰变的电介质子的产率，与不同的蒙特卡洛事件发生器的最接近原代顶点的距离，对重型弹药的质量的产量和最接近的距离方法的距离进行了比较，讨论了重夸克的产生。还提出了重型流动性生产横截面。在$ \ sqrt {s} = 13 $ TEV和$ \ sqrt {s _ {\ rm nn}} = 5.02 $ tev的p-pb分析状态以及p-pb分析的状态以及p-pb分析状态的结果。
Heavy quarks are useful probes to investigate the properties of the Quark-Gluon Plasma (QGP) produced in heavy-ion collisions at the LHC, since they are produced in initial hard scattering processes. To single out the signals that are characteristic of the QGP, it is nevertheless crucial to understand the primordial heavy-quark production in vacuum, and to disentangle hot from cold nuclear matter effects. Moreover, observations of collective effects in high-multiplicity pp and p-Pb collisions show surprising similarities with those in heavy-ion collisions. Heavy-flavour production in such collisions could give further insight into the underlying processes. The heavy-flavour production can be studied with $\rm e^{+}e^{-}$ pairs from correlated semileptonic decays of heavy-flavour hadrons. Compared to single heavy-flavour measurements, the dielectron yield contains information about the initial kinematical correlations between the charm and anti-charm quarks, which is otherwise not accessible, and is sensitive to soft heavy-flavour production. We report results on correlated $\rm e^{+}e^{-}$ pairs in pp collisions recorded by the ALICE detector at different collision energies. The production of heavy quarks is discussed by comparing the yield of dielectrons from heavy-flavour hadron decays as a function of invariant mass, pair transverse momentum and distance of closest approach to the primary vertex with different Monte Carlo event generators. The heavy-flavour production cross sections are also presented. Results from high-multiplicity pp collisions at $\sqrt{s} = 13$ TeV and the status of the p-Pb analysis at $\sqrt{s_{\rm NN}} = 5.02$ TeV are reported as well.
