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arXiv 2401.01360hep-phnucl-th
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小火球中的重味输运与强子化

Heavy-flavor transport and hadronization in a small fireball

Andrea Beraudo, Arturo De Pace, Daniel Pablos, Francesco Prino, Marco Monteno, Marzia Nardi

AI总结:

本文研究高能pp碰撞中小型退禁闭火球内的重味强子产生,采用局部色中和机制实现粲夸克与背景电荷重组强子化,定性再现了粒子产额比、横动量谱和椭圆流系数,支持小系统集体现象与重离子碰撞同源的观点。

摘要:

我们研究高能pp碰撞中的重味强子产生,假设形成了一个小型的、退禁闭且膨胀的火球,其中粲夸克可以经历再散射和强子化。我们采用与重离子碰撞相同的介质内强子化机制,该机制涉及通过粲夸克与背景火球中附近相反色电荷的重组来实现局部色中和(LCN)。热介质中的双夸克激发有利于粲重子的形成。涉及来自同一流体元的紧密对齐部分子的重组过程,有效地将系统的集体流转移给最终的粲强子。该框架能定性再现重味粒子产额比、横动量($p_T$)谱和椭圆流系数的实验观测结果。我们的结果为小系统中观测到的集体现象与重离子碰撞中观测到的具有相同起源这一观点提供了新的补充支持。

英文摘要:

We study heavy-flavor hadron production in high-energy pp collisions, assuming the formation of a small, deconfined and expanding fireball where charm quarks can undergo rescattering and hadronization. We adopt the same in-medium hadronization mechanism developed for heavy-ion collisions, which involves Local Color-Neutralization (LCN) through recombination of charm quarks with nearby opposite color charges from the background fireball. Diquark excitations in the hot medium favor the formation of charmed baryons. The recombination process, involving closely aligned partons from the same fluid cell, effectively transfers the collective flow of the system to the final charmed hadrons. This framework can qualitatively reproduce the observed experimental findings in heavy-flavor particle-yield ratios, $p_T$-spectra and elliptic-flow coefficients. Our results provide new, complementary support to the idea that the collective phenomena observed in small systems have the same origin as those observed in heavy-ion collisions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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