论文标题
$ \ pb碰撞$ \ sqrt {s _ {\ rm nn}} = 5.02 $ tev
$γ$-hadron spectra in p + Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV
论文作者
论文摘要
在假设产生夸克 - 胶质等离子体液滴的假设下，可以通过P + A碰撞中的流体动力学来描述其演化，在近代驱动的QCD Parton模型中，研究了$γ$触发的强子光谱，并具有中等修饰的parton Parton模型。小QGP液滴的初始条件和时空演变由超音速流体动力模型模拟提供，而这种培养基中的Parton能量损失则由高吐（HT）方法描述。此HT方法中的缩放喷气运输系数$ \ hat {q}/t^3 $是从中央A + A碰撞中的单个强子抑制中提取的。这种情况的数值结果表明，$γ$ -HADRON SPESTRA在$ p _ {\ rm t}^γ= 12-40 $ gev/$ c $被抑制5 \％$ \ sim $ 10 \％，在最中心的0-10 \％p + pb碰撞时，在$ \ sqrt $ \ sqrt $ \ sqrt tev colltions中。在$γ$触发的较高横向动量下，抑制变得较弱。作为比较，在$ \ sqrt {s _ {\ rm nn}} = 2.76 $和5.02 TEV的$ \ sqrt {s _ {s _ {s _ {s _ {s _ {s _ {s _ {s _ {s _ {
Under the assumption that a quark-gluon plasma droplet is produced and its evolution can be described by hydrodynamics in p + A collisions, $γ$-triggered hadron spectra are studied within a next-to-leading-order perturbative QCD parton model with the medium-modified parton fragmentation functions. The initial conditions and space-time evolution of the small QGP droplet are provided by the superSONIC hydrodynamic model simulations and parton energy loss in such a medium is described by the high-twist (HT) approach. The scaled jet transport coefficient $\hat{q}/T^3$ in this HT approach is extracted from single hadron suppression in central A + A collisions at the same colliding energy. Numerical results for this scenario show that $γ$-hadron spectra at $p_{\rm T}^γ=12-40$ GeV/$c$ are suppressed by 5\% $\sim$ 10\% in the most central 0 - 10\% p + Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV. The suppression becomes weaker at higher transverse momentum of the $γ$ trigger. As a comparison, $γ$-hadron suppression in Pb + Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ and 5.02 TeV is also predicted.
