Ad Lucem: QED parton distribution functions in the MMHT framework
Ad Lucem: QED parton distribution functions in the MMHT framework
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DOI：
10.1140/epjc/s10052-019-7296-0
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
L. Harland–Lang;Alan D. Martin;R. Nathvani;R. Thorne
中科院分区：
文献类型：
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作者：
L. Harland–Lang;Alan D. Martin;R. Nathvani;R. Thorne
我们提出了MMHT 2015 qed PDF集，从包含QED修正现有的MMHT部分子分布函数（PDF），其中包含质子的光子PDF。采用LUXqed公式的输入分布，我们讨论了我们的方法，包括QED效应的完整的，耦合的所有部分子与QED在，，。虽然我们发现质子的光子PDF与其他最近的集合的一致性，在此基础上，我们还提出了一组QED校正的中子PDF，并提供光子PDF分离成其弹性和非弹性的贡献。研究了QED修正对其他部分子和拟合质量的影响，并概述了光子的不确定性来源。最后，我们探讨了这一套的现象学意义，给出了弹性和非弹性贡献的光子和我们的光子PDF适合高质量的Drell-Yan生产，包括光子引发的通道的影响的部分子光度。
We present the MMHT2015qed PDF set, resulting from the inclusion of QED corrections to the existing set of MMHT Parton Distribution Functions (PDFs), and which contain the photon PDF of the proton. Adopting an input distribution from the LUXqed formulation, we discuss our methods of including QED effects for the full, coupled DGLAP evolution of all partons with QED at,,. While we find consistency for the photon PDF of the proton with other recent sets, building on this we also present a set of QED corrected neutron PDFs and provide the photon PDF separated into its elastic and inelastic contributions. The effect of QED corrections on the other partons and the fit quality is investigated, and the sources of uncertainty for the photon are outlined. Finally we explore the phenomenological implications of this set, giving the partonic luminosities for both the elastic and inelastic contributions to the photon and the effect of our photon PDF on fits to high mass Drell–Yan production, including the photon-initiated channel.