论文标题
Higgs和Drell合并重新调整的现象学 - YAN
Phenomenology of combined resummation for Higgs and Drell--Yan
论文作者
论文摘要
我们通过使用它来改善固定顺序结果来研究阈值和所谓的阈值横向横向动量重新持续的现象学对形式主义的现象学影响。这种形式主义允许系统地改进横向动量重新召集，该重新调整通过包含阈值贡献在整个$ p_t $的整个范围内有效。我们使用Borel方法作为合适的处方，用于在组合重新召集的表达式中定义逆梅林和傅立叶变换。该研究应用于两个QCD工艺，即通过Gluon Fusion生产的希格斯玻色子和$ z $ boson通过drell-yan机制生产。我们将结果与标准的横向动量重新召集以及固定顺序结果进行比较。我们发现，阈值得到改善的横向动量重新召集会导致在小$ p_t $下更快地扰动收敛，而阈值重新定义则改善了在中和大的$ p_t $下使用固定订单计算的协议。在希格斯的情况下，这些效果更为明显，而希格斯的扰动收敛较慢。
We study the phenomenological impact of a recently suggested formalism for the combination of threshold and a so-called threshold-improved transverse momentum resummation, by using it to improve the fixed-order results. This formalism allows for a systematic improvement of the transverse momentum resummation that is valid in the entire range of $p_T$ by the inclusion of the threshold contribution. We use the Borel method as a suitable prescription for defining the inverse Mellin and Fourier transforms in the context of combined resummed expression. The study is applied to two QCD processes, namely the Higgs boson produced via gluon fusion and $Z$ boson production via the Drell--Yan mechanism. We compare our results to the standard transverse momentum resummation, as well as to the fixed-order results. We find that the threshold-improved transverse momentum resummation leads to faster perturbative convergence at small $p_T$ while the inclusion of threshold resummation improves the agreement with fixed-order calculations at medium and large $p_T$. These effects are more pronounced in the case of Higgs which is known to have slower perturbative convergence.
