论文标题
解决$ r _ {\ rm pa} $和$ v_2 $ $ d^0 $ mesons in $ p- $ pb碰撞在LHC
Resolving the $R_{\rm pA}$ and $v_2$ puzzle of $D^0$ mesons in $p-$Pb collisions at the LHC
论文作者
论文摘要
了解有关LHC Energies $ d^0 $ erson的核修饰因子和椭圆流的实验数据和椭圆流的实验数据是一个挑战。在这项工作中，我们通过改进的多相运输模型研究这些碰撞。通过包括Cronin效应（即横向动量拓宽）和魅力夸克的独立片段化，我们提供了$ d^0 $ Meson $ r _ {\ rm pa} $和$ v_2 $数据的第一个同时描述和$ p _ {\ rm t} \ rm t} \ leq 8 $ geev $/c $/c $/c $。该模型还合理地描述了$ d^0 $ Meson $ p _ {\ rm t} $ spectra和low-$ p _ {\ rm t} $ offed hadron Spectra，$ r _ {\ rm pa} $和$ v_2 $。我们的结果表明，parton互动和cronin效应对于$ d^0 $ Meson $ r _ {\ rm pa} $都很重要，而Parton Interactions则主要负责$ d^0 $ Meson $ v_2 $。因此，必须将cronin效应包括在$ d^0 $ Meson $ r _ {\ rm pa} $和$ v_2 $的同时描述中。这项工作意味着，cronin效应对于大型系统中的重雄龙也可能很重要。
It has been a challenge to understand the experimental data on both the nuclear modification factor and elliptic flow of $D^0$ mesons in $p-$Pb collisions at LHC energies. In this work, we study these collisions with an improved multi-phase transport model. By including the Cronin effect (i.e., transverse momentum broadening) and independent fragmentation for charm quarks, we provide the first simultaneous description of the $D^0$ meson $R_{\rm pA}$ and $v_2$ data at $p_{\rm T} \leq 8$ GeV$/c$. The model also reasonably describes the $D^0$ meson $p_{\rm T}$ spectra and the low-$p_{\rm T}$ charged hadron spectra, $R_{\rm pA}$ and $v_2$. Our results show that both parton interactions and the Cronin effect are important for the $D^0$ meson $R_{\rm pA}$, while parton interactions are mostly responsible for the $D^0$ meson $v_2$. It is thus essential to include the Cronin effect for the simultaneous description of the $D^0$ meson $R_{\rm pA}$ and $v_2$. This work implies that the Cronin effect could also be important for heavy hadrons in large systems.
