论文标题
Xe-Xe碰撞中的中央和前向快速产生的含有重型风味生产，$ \ sqrt {s _ {\ rm nn}} = 5.44 $ tev
Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt{s_{\rm NN}}=5.44$ TeV
论文作者
论文摘要
据报道，使用LHC上的爱丽丝检测器的TEV，在$ \ sqrt {s _ {\ rm nn}} $ = 5.44 TEV中，XE-XE碰撞中产生的MUON和电子产生的第一个测量值。核修饰因子$ r _ {\ rm aa} $的测量是作为横向动量$ p _ {\ rm t} $的函数，在远期快速时（$ 2.5 <y <4 $）（$ 2.5 <y <4 $）和MUITRAPITION（$ \ vert y \ vert y \ vert y \ vert <0.8 $），MUONS和ELECTRON的ELECTRON，MUONS和ELECTROR的Electron。与二进制尺度的PP参考相比，在中央和正向速度的中央碰撞中观察到了一个高达约2.5的因子的抑制。将重量流动性强调衰变的MUON的$ r _ {\ rm aa} $与$ \ sqrt {s _ {\ rm nn}} $ = 5.02 tev进行比较。当比较XE-XE碰撞0-10％的核修饰因子时，PB-PB碰撞的核修饰因子为10-20％时，在$ r _ {\ rm aa} \ sim 0.4 $中，$ r _ {\ rm aa} \ sim 0.4 $在$ p _ {观察到GEV/$ C $。在两个碰撞系统中测得的$ r _ {\ rm aa} $值的比较通过研究媒体尺寸和路径长度的依赖性，从而带来了对Quark-Gluon等离子体的特性的新见解。来自重型燃烧强体衰变的兆和电子结果为模型计算提供了新的限制。
The first measurements of the production of muons and electrons from heavy-flavour hadron decays in Xe-Xe collisions at $\sqrt{s_{\rm NN}}$ = 5.44 TeV, using the ALICE detector at the LHC, are reported. The measurement of the nuclear modification factor $R_{\rm AA}$ is performed as a function of transverse momentum $p_{\rm T}$ in several centrality classes at forward rapidity ($2.5 < y <4$) and midrapidity ($\vert y \vert < 0.8$) for muons and electrons from heavy-flavour hadron decays, respectively. A suppression by a factor up to about 2.5 compared to the binary-scaled pp reference is observed in central collisions at both central and forward rapidities. The $R_{\rm AA}$ of muons from heavy-flavour hadron decays is compared to previous measurements in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. When the nuclear modification factors are compared in the centrality classes 0-10% for Xe-Xe collisions and 10-20% for Pb-Pb collisions, which have similar charged-particle multiplicity density, a similar suppression, with $R_{\rm AA} \sim 0.4$ in the $p_{\rm T}$ interval $4 < p_{\rm T} < 8$ GeV/$c$, is observed. The comparison of the measured $R_{\rm AA}$ values in the two collision systems brings new insights on the properties of the quark-gluon plasma by investigating the system-size and path-length dependence of medium-induced parton energy loss. The results of muons and electrons from heavy-flavour hadron decays provide new constraints to model calculations.
