论文标题
小x的drell-yan hadronic张量的量规不变TMD分解
Gauge-invariant TMD factorization for Drell-Yan hadronic tensor at small x
论文作者
论文摘要
电磁（EM）电流的DREL-YAN HADRONIC张量在Sudakov区域$ s \ gg q^2 \ gg q_ \ perp^2 $，$ {1 \ fos q^2} $精度，然后在树级上，然后以双log准确度。可以证明，由于QCD运动方程式，在$ N_C $ $ N_C $中的领先顺序中，将Quark-Quark-Gluon TMD降低为领先的TMD。最终的非校准HADRON的张量是Em量规不变的，并且取决于两个领先的TMD：$ f_1 $负责Total Dy Cross部分，而Boer-Mulders功能$ H_1^\ perp $。 DY过程的角度分布的魔力顺序估计似乎与相应的运动学上的LHC结果一致。
The Drell-Yan hadronic tensor for electromagnetic (EM) current is calculated in the Sudakov region $s\gg Q^2\gg q_\perp^2$ with ${1\over Q^2}$ accuracy, first at the tree level and then with the double-log accuracy. It is demonstrated that in the leading order in $N_c$ the higher-twist quark-quark-gluon TMDs reduce to leading-twist TMDs due to QCD equation of motion. The resulting tensor for unpolarized hadrons is EM gauge-invariant and depends on two leading-twist TMDs: $f_1$ responsible for total DY cross section, and Boer-Mulders function $h_1^\perp$. The order-of-magnitude estimates of angular distributions for DY process seem to agree with LHC results at corresponding kinematics.
