CTEQ-TEA parton distribution functions with intrinsic charm
CTEQ-TEA parton distribution functions with intrinsic charm
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DOI：
10.1051/epjconf/201819200003
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
M. Guzzi;T. Hou;S. Dulat;Jun Gao;J. Huston;P. Nadolsky;C. Schmidt;J. Winter;K. Xie;C. Yuan
中科院分区：
文献类型：
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作者：
M. Guzzi;T. Hou;S. Dulat;Jun Gao;J. Huston;P. Nadolsky;C. Schmidt;J. Winter;K. Xie;C. Yuan
研究了核子中粲部分子分布函数（PDF）的（相当大的）非微扰贡献的可能性及其解释中出现的理论问题。从全球PDF分析的结果。讨论了从其余的辐射贡献的非微扰魅力的通用组件的分离和LHC散射过程的非微扰魅力PDF的潜在影响进行了说明。利用HERA和大型强子对撞机（LHC）的最新实验数据，给出了CT 14和CT 14 HERA 2整体QCD分析中在QCD耦合强度的次-次-首阶（NNLO）下的非微扰粲星等的估计.不同模型的内在魅力之间的比较和LHC的标准烛光观测值的前景进行了说明。
The possibility of a (sizable) nonperturbative contribution to the charm parton distribution function (PDF) in a nucleon is investigated together with theoretical issues arising in its interpretation. Results from the global PDF analysis are presented. The separation of the universal component of the nonperturbative charm from the rest of the radiative contributions is discussed and the potential impact of a nonperturbative charm PDF on LHC scattering processes is illustrated. An estimate of nonperturbative charm magnitude in the CT14 and CT14HERA2 global QCD analyses at the next-to-next-to leading order (NNLO) in the QCD coupling strength is given by including the latest experimental data from HERA and the Large Hadron Collider (LHC). A comparison between different models of intrinsic charm is shown and prospects for standard candle observables at the LHC are illustrated.