论文标题
包容性喷气$ r_ {aa} $的相互作用机制和喷气能源损失分布的提取
Interplaying mechanisms behind inclusive jet $R_{AA}$ and extraction of jet energy loss distributions
论文作者
论文摘要
LHC重型离子碰撞中观察到的包含喷气抑制在$ p_ {t} $ = 50-1000 GEV范围内的$ p_ {t} $依赖性非常弱，几乎与碰撞能量无关，尽管散装介质的初始能量密度已从$ \ sqrt {s}} $ = 2.76 $ = 2.76至5.02 tev中增加了。这种有趣的现象在线性玻尔兹曼传输（LBT）模型中进行了研究，以在事件发生3+1D水力背景下进行喷射传播。我们表明，JET $ r_ {aa} $的$ p_ {t} $依赖性由$ p+p $碰撞中的初始频谱和$ p_ {t} $依赖于喷气能量损失的依赖性。此外，通过最先进的贝叶斯分析直接从实验数据中提取了包含射流和$γ-$ jet的JET能量损失分布。平均的喷气能量损失的$ p_ {t} $依赖性较弱，而缩放的喷射能量损耗分布的宽度很大，这两者都与LBT模拟一致，并表明喷射淬火仅由几个倒数外的喷射媒体中等散射引起。
The observed inclusive jet suppression in heavy-ion collisions at LHC has a very weak $p_{T}$ dependence over a large range of $p_{T}$ = 50-1000 GeV and is almost independent of the colliding energy, though the initial energy density of the bulk medium has increased from $\sqrt{s}$ = 2.76 to 5.02 TeV by about 20%. This interesting phenomenon is investigated in the linear Boltzmann transport (LBT) model for jet propagation in an event-by-event 3+1D hydro background. We show that the $p_{T}$ dependence of jet $R_{AA}$ is determined by the initial spectrum in $p+p$ collisions and $ p_{T} $ dependence of jet energy loss. Furthermore, jet energy loss distributions for inclusive jet and $ γ-$jet at both LHC energies are extracted directly from experimental data through the state-of-art Bayesian analysis. The averaged jet energy loss has a weak $p_{T}$ dependence and the scaled jet energy loss distributions have a large width, both of which are consistent with the LBT simulations and indicate that jet quenching is caused by only a few out-of-cone jet medium scatterings.
