论文标题
在共线性分解中改进高能$ e^+e^ - $ COLLIDER的方法和预测
Improving methods and predictions at high-energy $e^+e^-$ colliders within collinear factorisation
论文作者
论文摘要
我们说明了如何在高能量预测的上下文中采用高能量预测$ E^+e^ - $ - $ - 碰撞过程的电子parton分布函数（PDF）。特别是，我们讨论了此类PDF的重量级化组方程演变如何受到多个费米昂家族的存在及其各自的质量阈值的影响，以及对分解和重量化方案的选择的依赖。我们研究了与PDF相关的不确定性对物理横截面的影响，以便对使用共线因素化公式计算出的观测值进行现实的精确估计。我们这样做是通过为生产重中性物体以及$ t \ bar {t} $和$ w^+w^ - $对的结果来做到这一点，包括electroweak Origin的临时订购效应。
We illustrate how electron Parton Distribution Functions (PDFs) with next-to-leading collinear logarithmic accuracy must be employed in the context of perturbative predictions for high-energy $e^+e^-$-collision processes. In particular, we discuss how the renormalisation group equation evolution of such PDFs is affected by the presence of multiple fermion families and their respective mass thresholds, and by the dependences on the choices of the factorisation and renormalisation schemes. We study the impact of the uncertainties associated with the PDFs on physical cross sections, in order to arrive at realistic precision estimates for observables computed with collinear-factorisation formulae. We do so by presenting results for the production of a heavy neutral object as well as for $t\bar{t}$ and $W^+W^-$ pairs, including next-to-leading-order effects of electroweak origin.
