Next-to-leading order QCD corrections to the decay of Higgs to vector meson and Z boson  

作　　者：孙庆峰 王安民 

机构地区：[1]Department of Modern Physics,University of Science and Technology of China

出　　处：《Chinese Physics C》2018年第3期51-55,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11375168)

摘　　要：The exclusive decay of the Higgs boson to a vector meson （J/φ or γ（1S）） and Z boson is studied in this work. The decay amplitudes are separated into two parts in a gauge invariant manner. The first part comes from the direct coupling of the Higgs boson to the charm （bottom） quark and the other from the HZZ＊ or the loop-induced HZγ＊ vertexes in the standard model. While the branching ratios from the direct channel are much smaller than those of the indirect channel, their interference terms give nontrivial contributions. We further calculate the QCD radiative corrections to both channels, which reduce the total branching ratios by around 20% for both J/φ and γ（1S） production. Our results provide a possible chance to check the SM predictions of the Hcc（Hbb） coupling and to seek for hints of new physics at the High Luminosity LHC or future hadron colliders.The exclusive decay of the Higgs boson to a vector meson （J/φ or γ（1S）） and Z boson is studied in this work. The decay amplitudes are separated into two parts in a gauge invariant manner. The first part comes from the direct coupling of the Higgs boson to the charm （bottom） quark and the other from the HZZ＊ or the loop-induced HZγ＊ vertexes in the standard model. While the branching ratios from the direct channel are much smaller than those of the indirect channel, their interference terms give nontrivial contributions. We further calculate the QCD radiative corrections to both channels, which reduce the total branching ratios by around 20% for both J/φ and γ（1S） production. Our results provide a possible chance to check the SM predictions of the Hcc（Hbb） coupling and to seek for hints of new physics at the High Luminosity LHC or future hadron colliders.

关 键 词：standard-model Higgs bosons perturbative calculations 

分 类 号：O572.2[理学—粒子物理与原子核物理]