Parton distribution functions and benchmark cross sections at next-to-next-to-leading order
Parton distribution functions and benchmark cross sections at next-to-next-to-leading order
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DOI：
10.1103/physrevd.86.054009
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发表时间：
2012-09-07
影响因子：
5
通讯作者：
Moch, S.
中科院分区：
文献类型：
--
作者：
Alekhin, S.;Bluemlein, J.;Moch, S.
根据深度非弹性散射的世界数据和Drell-Yan过程的固定目标数据，我们确定了QCD中次前级和次前级的部分子分布函数(ABM11)和强耦合常数α(S)。当n(F)=3，4，5时，采用固定味数方案进行分析，对α(S)和重夸克质量采用(MS)OVER BAR方案。在NNLO时，我们得到α(S)(M-Z)=0.1134+/-0.0011。FIT结果被用于计算强子对撞机的基准截面，以达到NNLO精度，并与LHC的数据进行比较。
We present a determination of parton distribution functions (ABM11) and the strong coupling constant alpha(s) at next-to-leading order and next-to-next-to-leading order (NNLO) in QCD based on world data for deep-inelastic scattering and fixed-target data for the Drell-Yan process. The analysis is performed in the fixed-flavor number scheme for n(f) = 3, 4, 5 and uses the (MS) over bar scheme for alpha(s) and the heavy-quark masses. At NNLO we obtain the value alpha(s) (M-Z) = 0.1134 +/- 0.0011. The fit results are used to compute benchmark cross sections at hadron colliders to NNLO accuracy and to compare to data from the LHC.