arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1207.6533hep-phhep-exnucl-th
收藏

LHC上粲夸克/反夸克对的产生

Production of charm quark/antiquark pairs at LHC

Rafal Maciula, Marta Luszczak, Antoni Szczurek

摘要:

我们讨论在大型强子对撞机的魅力生产。在$k_t$ -因子分解方法中计算单个$c \bar c$对的产生。我们使用几个未整合的胶子分布的文献。强子化的帮助下,发现在$e^+ e^-$碰撞的粲介子的生产的碎裂功能。几个粲介子的微分分布,并比较ALICE和LHCb合作的最新结果。此外,我们讨论了生产的两对$c \bar c$内的一个简单的形式主义的双部分子散射(DPS)。令人惊讶的大截面,可比的单部分子散射(SPS)的贡献,预测的LHC能量。总包含截面作为能量和微分分布的函数示出。我们包括最近讨论的演化的双重部分子在两个尺度的情况下。我们讨论的角度如何确定双散射的贡献。我们发现,与单次散射相比,不同硬部分子散射的粲夸克之间的大快度距离具有更大的截面。

英文摘要:

We discuss charm production at LHC. The production of single $c \bar c$ pairs is calculated in the $k_t$-factorization approach. We use several unintegrated gluon distributions from the literature. The hadronization is included with the help of fragmentation functions found for the production of charmed mesons in $e^+ e^-$ collisions. Differential distributions for several charmed mesons are presented and compared to recent results of the ALICE and LHCb collaborations. Furthermore we discuss production of two pairs of $c \bar c$ within a simple formalism of double-parton scattering (DPS). Surprisingly large cross sections, comparable to single-parton scattering (SPS) contribution, are predicted for LHC energies. Both total inclusive cross section as a function of energy and differential distributions are shown. We include recently discussed evolution of double partons in the case of two scales. We discuss perspectives how to identify the double scattering contribution. We find much larger cross section for large rapidity distance between charm quarks from different hard parton scatterings compared to single scattering.

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。

↑