用ATLAS实验研究重离子碰撞中的射流产生

H. Santos
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引用次数: 0

摘要

射流是研究大型强子对撞机中Pb+Pb碰撞产生的热致密物质的重要工具。它们是在碰撞的早期阶段产生的,当它们在热而稠密的介质中传播时,预计会被修改。这会导致能量损失以及射流结构的改变。这些研究重点介绍了ATLAS在260 pb−1和1.7 nb−1的pp和pb + pb碰撞数据中分别测量到的最新喷流测量结果,每核子对的速度为5.02 TeV。实验结果包括:测量了双喷流的不对称性与前导喷流横向动量的关系;利用大半径参数用反kt算法重建喷流时揭示的内部结构的抑制模式;测量了粒子对Z玻色子的反冲。这些数据为了解喷射淬火的强度和机理提供了重要的信息。
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Jet Production in Heavy Ion Collisions with the ATLAS Experiment
Jets are an important tool to study the hot, dense matter produced in Pb+Pb collisions at the LHC. They are produced at the early stages of the collisions and are expected to be modified as they propagate through the hot and dense medium. This leads to energy loss as well as modification of the jet structure. These proceedings highlight some of the latest jet measurements from ATLAS measured in 260 pb−1 and 1.7 nb−1 of pp and Pb+Pb collision data, respectively, at 5.02 TeV per nucleon pair. The results shown include measurements of the dijet asymmetry as a function of the leading jet transverse momentum, the suppression pattern of the internal structure, revealed when reconstructing jets with the anti-kt algorithm using large radius parameters, and measurements of particles recoiling against the Z boson. The data provide important information to understand the strength and mechanism of jet quenching.
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