低重整化对HERA数据的量子色动力学分析的影响。
Impact of low- resummation on QCD analysis of HERA data.
作者信息
Abdolmaleki Hamed, Bertone Valerio, Britzger Daniel, Camarda Stefano, Cooper-Sarkar Amanda, Giuli Francesco, Glazov Alexander, Kusina Aleksander, Luszczak Agnieszka, Olness Fred, Sapronov Andrey, Shvydkin Pavel, Wichmann Katarzyna, Zenaiev Oleksandr, Bonvini Marco
机构信息
1Faculty of Physics, Semnan University, Semnan, 35131-19111 Iran.
2Department of Physics and Astronomy, VU University, 1081 HV Amsterdam, The Netherlands.
出版信息
Eur Phys J C Part Fields. 2018;78(8):621. doi: 10.1140/epjc/s10052-018-6090-8. Epub 2018 Aug 3.
Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low and low . A resolution of this tension incorporating -resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy resummation not only gives a better description of the data, particularly of the longitudinal structure function , it also results in a gluon PDF which is steeply rising at low for low scales, , contrary to the fixed-order NLO and NNLO gluon PDF.
在量子色动力学（QCD）的传统DGLAP框架内对HERA深度非弹性散射截面的最终组合数据进行拟合时，在低(x)和低(Q^2)处显示出一些矛盾。使用xFitter程序研究了将(k_T)重求和项纳入HERAPDF拟合中来解决这一矛盾的方法。划定了这种重求和很重要的运动学区域。这种高能重求和不仅能更好地描述数据，特别是纵向结构函数(F_L)，还会导致胶子部分子分布函数（PDF）在低尺度(Q^2)下对于低(x)急剧上升，这与固定阶次的NLO和NNLO胶子PDF相反。
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