QCD corrections to e~+e~-→H±W~? in Type-Ⅰ THDM at electron positron colliders

作     者：杨强 张仁友 龙明明 王少明 马文淦 朱剑文 蒋一 

作者机构：State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China Department of Physics Chongqing University 

出 版 物：《Chinese Physics C》 (中国物理C)

年 卷 期：2020年第44卷第9期

页      面：11-19页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported in part by the National Natural Science Foundation of China (11775211,11535002) the CAS Center for Excellence in Particle Physics (CCEPP) 

摘      要：We investigate in detail the charged Higgs production associated with a W boson at electron-positron colliders within the framework of the Type-Ⅰ two-Higgs-doublet model (THDM).We calculate the integrated cross section at the LO and analyze the dependence of the cross section on the THDM parameters and the colliding energy in a benchmark scenario of the input parameters of the Higgs *** numerical results show that the integrated cross section is sensitive to the charged Higgs mass,especially in the vicinity of mH~±≈184 GeVat a500 GeVe~+e~- collider,and decreases consistently with the increase oftanβin the lowtanβ*** peak in the colliding energy distribution of the cross section arises from the resonance of the loop integrals,and it moves towards the low colliding energy with the increase of mH~±.We also study the two-loop NLO QCD corrections to both the integrated cross section and the angular distribution of the charged Higgs boson and find that the QCD relative correction is also sensitive to the charged Higgs mass and strongly depends on the final-state phase *** tanβ=2,the QCD relative correction at a 500 GeV e~+e~-collider varies in the range of[-10%,11%]as mH~±increases from 150 to 400 GeV.