重离子物理在LHC与ATLAS探测器
Heavy Ion Physics at the LHC with the ATLAS Detector
摘要：
欧洲核子研究中心的ATLAS探测器将为即将在LHC（sqrt（s_NN）= 5520 GeV）进行的重离子碰撞研究提供高分辨率分段量热计和精确跟踪。量热计包括电磁和强子部分的|eta| <5，而内探测器光谱仪包括|eta| <2.5。ATLAS将研究表征LHC形成的热和致密物质所需的全方位可观测量。全球测量（粒子多重性，集体流动）将提供进入其热力学和流体动力学特性。测量100 GeV的完整射流将允许详细研究能量损失及其对射流的影响。夸克尼亚将提供一个解除禁闭机制的把手。ATLAS还将使用前向物理探测器和超外围碰撞来研究核子和原子核的结构，这两种探测器都是由分段的零度热量计实现的。
英文摘要：
The ATLAS detector at CERN will provide a high-resolution longitudinally-segmented calorimeter and precision tracking for the upcoming study of heavy ion collisions at the LHC (sqrt(s_NN)=5520 GeV). The calorimeter covers |eta|<5 with both electromagnetic and hadronic sections, while the inner detector spectrometer covers |eta|<2.5. ATLAS will study a full range of observables necessary to characterize the hot and dense matter formed at the LHC. Global measurements (particle multiplicities, collective flow) will provide access into its thermodynamic and hydrodynamic properties. Measuring complete jets out to 100's of GeV will allow detailed studies of energy loss and its effect on jets. Quarkonia will provide a handle on deconfinement mechanisms. ATLAS will also study the structure of the nucleon and nucleus using forward physics probes and ultraperipheral collisions, both enabled by segmented Zero Degree Calorimeters.
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