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arXiv 1301.3033hep-phhep-exnucl-ex
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LHC - $k_{t}$ -因子分解方法下的开魅力产生

Open charm production at the LHC - $k_{t}$-factorization approach

Rafal Maciula, Antoni Szczurek

摘要:

讨论了LHC质子-质子散射中开粲的包容产生。在$k_t$ -因子分解方法中执行计算。不同的模型的未积分胶子分布(UGDF)从文献中使用。将粲介子的理论横动量和赝快度分布与ATLAS、ALICE和LHCb合作的最新实验数据进行了比较。只有Kimber-Martin-Ryskin(KMR)UGDF的计算结果与实验结果相当。所有其他流行的UGDF模型都显着低估了实验数据。对理论预测的不确定性的几个来源也进行了详细的研究。此外,我们还讨论了$D$和$\bar D$介子之间的关联。在KMR UGDF中,我们很好地描述了$D$和$\bar D$介子的不变质量和相对方位角的实验分布。在文献中的其他方法中没有讨论LHCb实验测量的相关观测值。

英文摘要:

We discuss inclusive production of open charm in proton-proton scattering at LHC. The calculation is performed within the $k_t$-factorization approach. Different models of unintegrated gluon distributions (UGDF) from the literature are used. The theoretical transverse momentum as well as (pseudo)rapidity distributions of charmed mesons are compared with recent experimental data of ATLAS, ALICE and LHCb collaborations. Only the calculation with Kimber-Martin-Ryskin (KMR) UGDF gives results comparable to experimental ones. All other popular models of UGDF significantly underpredict experimental data. Several sources of uncertainties of the theoretical predictions are also studied in details. In addition we discuss correlations between $D$ and $\bar D$ mesons. Good description of experimental distribution in invariant mass and in relative azimuthal angle between $D$ and $\bar D$ mesons is achieved for the KMR UGDF. The considered correlation observables measured by the LHCb experiment were not discussed in other approaches in the literature.

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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