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Radiative Corrections to e~+e~-→ Zh at Future Higgs Factory in the Minimal Dilaton Model
基金项目:Supported by the National Natural Science Foundation of China under Grant No. 11305050, and by Specialized Research Fund for the Doctoral Program of Higher Education under Grant No. 20124104120001
摘    要:The minimal dilaton model(MDM) extends the Standard Model by one singlet scalar called dilaton and one top quark partner called t. In this work we investigate the t-induced radiative correction to the Higgs-strahlung production process e+e-→ Zh at future Higgs factory. We first present the analytical calculations in detail and show how to handle the ultraviolet divergence. Then we calculate the correction numerically by considering the constraints from precision electroweak data. We find that, for sin θL= 0.2 and mt = 1200 Ge V, the correction is 0.26% and 2.1% for (se+e)~(1/2)-= 240 Ge V, 1 Te V respectively, and a larger value can be achieved as sin θLincreases.

收稿时间:2014-12-01

Radiative Corrections to e+e-→Zh at Future Higgs Factory in the Minimal Dilaton Model
HENG Zhao-Xia,LI Dong-Wei,ZHOU Hai-Jing. Radiative Corrections to e+e-→Zh at Future Higgs Factory in the Minimal Dilaton Model[J]. Communications in Theoretical Physics, 2015, 63(2): 188-194
Authors:HENG Zhao-Xia  LI Dong-Wei  ZHOU Hai-Jing
Affiliation:1. Department of Physics, Henan Normal University, Xinxiang 453007, China;2. Department of Foundation, Henan Police College, Zhengzhou 450000, China
Abstract:The minimal dilaton model (MDM) extends the Standard Model by one singlet scalar called dilaton and one top quark partner called t'. In this work we investigate the t'-induced radiative correction to the Higgs-strahlung production process e+e-→Zh at future Higgs factory. We first present the analytical calculations in detail and show how to handle the ultraviolet divergence. Then we calculate the correction numerically by considering the constraints from precision electroweak data. We find that, for sin θL=0.2 and mt'=1200 GeV, the correction is 0.26% and 2.1% for √Se+e=240 GeV, 1 TeV respectively, and a larger value can be achieved as sin θL increases.
Keywords:minimal dilaton model  radiative corrections  top quark partner  
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