论文标题
用爱丽丝在LHC上测量重量培养喷气机
Measurements of heavy-flavor jets with ALICE at the LHC
论文作者
论文摘要
在反应的早期阶段，在超相关的重型离子碰撞中产生的重夸克主要是在硬性QCD过程中产生的。它们通过半硬化和软过程（例如通过Gluon辐射和碰撞损失）与整个培养基的整个演化中的热和冷核物质相互作用。 P-A系统中重型口味的核修饰提供了对冷核物质效应的见解，例如（反）阴影和$ k_ {t} $ - 扩展，并作为A-A研究的基线。除此之外，完全重建的重风味喷气机还提供了有关碎片化的风味（或质量）依赖性，色电荷效应以及对晚期Gluon分裂的贡献的其他信息。在此贡献中，我们介绍了$ \ sqrt {s _ {\ rm nn}} = 5.02 $ tev tev和$ c $ -JET生产的PP，P-PB和PB-PB碰撞，由Alice实验在LHC中测量的PP，P-PB和PB-PB碰撞。还提出了PB和PB-PB碰撞中$ C $ -JET的核修饰因子的测量。将实验测量结果与蒙特卡洛事件发生器（Pythia 6，Pythia 8和Herwig 7）和NLO PQCD计算（Powheg+Pythia6）进行了比较。我们发现测量值与Monte Carlo事件发生器的结果以及NLO PQCD计算的结果很好。
Heavy quarks created in ultra-relativistic heavy-ion collisions are mostly produced in hard QCD processes during the early stages of the reaction. They interact with the hot and cold nuclear matter throughout the evolution of the medium via semi-hard and soft processes such as energy loss via gluon radiations and collisions. Nuclear modification of heavy flavors in p-A systems provides insight into cold nuclear matter effects such as (anti)shadowing and $k_{T}$-broadening, and serves as a baseline for A-A studies. In addition to that the fully reconstructed heavy-flavor jets provide additional information on the flavor (or mass) dependence of fragmentation, color charge effects as well as insight into the contribution of late gluon splitting. In this contribution, we present the measurements of $b$-jet production in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV and $c$-jet production in pp, p-Pb and Pb-Pb collisions measured by the ALICE experiment at the LHC. The measurements of the nuclear modification factors for $c$-jet in p-Pb and Pb-Pb collisions are also presented. The experimental measurements are compared with the results from Monte Carlo event generators (PYTHIA 6, PYTHIA 8 and Herwig 7) and the NLO pQCD calculations (POWHEG+PYTHIA6). We find good agreement of the measurements with the results from Monte Carlo event generators and from NLO pQCD calculations.
