Speaker
Dr
国兴 王
(Zhejiang University)
Description
Higgs boson pair(HH) production and Z boson and Higgs boson(ZH) associated production are both very important processes at the LHC. Their gluon fusion channel is a class of loop-induced process, whose NLO correction in QCD is quite challenging, due to the appearance of difficult two loop Feynman integrals. In this talk, I will show our progress of the NLO calculations of these two processes. Recently, we present a precise and efficient computation of the two-loop amplitudes entering HH and ZH production processes via gluon fusion. Our approach is based on the small-external-mass expansion while keeping the full dependence on the top quark mass and other kinematic invariants. We find that our method provides precision numeric predictions in the entire phase space, while at the same time is highly efficient as the computation can be easily performed on a normal desktop or laptop computer. Our method is valuable for practical phenomenological studies. Finally, I will show some preliminary phenomenological results for NLO ZH production via gluon fusion, which are unknown for us before.
Primary authors
Prof.
Lilin Yang
(Zhejiang University)
Yongqi XU
(Peking University)
Dr
国兴 王
(Zhejiang University)
宇轩 王
(Peking University)
小峰 徐
(school of physics Peking Uniersity)
