On the next-to-next-to-leading order QCD corrections to heavy-quark production in deep-inelastic scattering
On the next-to-next-to-leading order QCD corrections to heavy-quark production in deep-inelastic scattering
复制标题
关于深非弹性散射中重夸克产生的次次次前导 QCD 校正
DOI：
10.1016/j.nuclphysb.2012.07.001
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发表时间：
2012
影响因子：
2.8
通讯作者：
Kawamura H
中科院分区：
文献类型：
--
作者：
Kawamura H
在微扰QCD的次领先阶（NNLO）中，质量为m <$Λ的夸克的贡献是深度非弹性散射（DIS）中唯一未知的结构函数。我们提出了部分子阈值附近、高能（小x）极限和高尺度Q2 m2下最重要的结构函数F2（x，Q2）的改进的部分NNLO结果;并利用这些结果来构造覆盖整个运动学平面的胶子和夸克系数函数的近似。仔细研究了近似不确定性，发现只有在比约肯变量的非常小的值x 10 - 3时，近似不确定性才会很大。
The contribution of quarks with masses m≫ΛQCDis the only part of the structure functions in deep-inelastic scattering (DIS) which is not yet known at the next-to-next-to-leading order (NNLO) of perturbative QCD. We present improved partial NNLO results for the most important structure function F2(x,Q2) near the partonic threshold, in the high-energy (small-x) limit and at high scales Q2≫m2; and employ these results to construct approximations for the gluon and quark coefficient functions which cover the full kinematic plane. The approximation uncertainties are carefully investigated, and found to be large only at very small values, x≲10−3, of the Bjorken variable.