论文标题
在$ \ sqrt {s _ {\ rm nn}} $ = 5.02 TEV处的PB-PB碰撞中的流动角和流量幅度波动的观察
Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the CERN Large Hadron Collider
论文作者
论文摘要
这封信报告了使用新的四粒子相关器确定的横向动量依赖流动角$ψ_n$和流量量$ v_n $波动的首次测量。这些测量值是针对PB-PB碰撞中各种核心的质量质量能量，每核对$ \ sqrt {s _ {\ rm nn}} $ = 5.02 tev与爱丽丝夹在塞恩大型Handron碰撞机上的质量能量。流动角和流量幅度波动均在提出的中心范围内观察到，并且在最中心的碰撞中最强，对于横向动量$ p _ {\ rm t}> 2 $ gev/$ c $。与包括IEBE-VISHNU，音乐和AMPT在内的理论模型进行比较，表明测量值对重离子碰撞的最初状态具有独特的敏感性。
This Letter reports on the first measurements of transverse momentum dependent flow angle $Ψ_n$ and flow magnitude $v_n$ fluctuations, determined using new four-particle correlators. The measurements are performed for various centralities in Pb-Pb collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}}$ = 5.02 TeV with ALICE at the CERN Large Hadron Collider. Both flow angle and flow magnitude fluctuations are observed in the presented centrality ranges and are strongest in the most central collisions and for a transverse momentum $p_{\rm T}>2$ GeV/$c$. Comparison with theoretical models, including iEBE-VISHNU, MUSIC, and AMPT, show that the measurements exhibit unique sensitivities to the initial state of heavy-ion collisions.
