One-loopformulas for H→Zν_(ι)ν_(ι),forιe,μ,τin't Hooft-Veltman gauge  

作　　者：Dzung Tri Tran Khiem Hong Phan 

机构地区：[1]Institute of Fundamental and Applied Sciences,Duy Tan University,Ho Chi Minh City 700000,Vietnam [2]Faculty of Natural Sciences,Duy Tan University,Da Nang City 550000,Vietnam

出　　处：《Chinese Physics C》2023年第5期112-131,共20页中国物理C（英文版）

基　　金：funded by Vietnam National Foundation for Science and Technology Development(NAFOSTED)under the grant number(103.01-2019.346)。

摘　　要：In this paper,we present analytical results for one-loop contributions to the decay processes H-Zvivi(for I=e,μ,T).The calculations are performed within the Standard Model framework in the't Hooft-Veltman gauge.One-loop form factors are then written in terms of scalar one-loop functions in the standard notations of LoopTools.As a result,one-loop decay rates for the decay channels can be evaluated numerically by using the package.Furthermore,we analyze the signals of H→Zvivi via the production processes e-e+→ZH*-Z(H*→Zν_(ι)ν_(ι)),including the initial beam polarizations at future lepton colliders.The Standard Model backgrounds,such as the processes e-e+→ν_(ι)ν_(ι)ZZ,are also examined in this study.Numerical results indicate that one-loop corrections make contributions of approximately 10%to the decay rates.These are sizeable contributions and should be taken into account at future colliders.We show that the signals H-Zν_(ι)ν_(ι)are clearly visible at the center-of-mass energy√s=250 GeV and are difficult to probe in higher-energy regions owing to the dominant backgrounds.

关 键 词：Higgs phenomenology one-loop Feynman integrals analytic methods for quantum field theory dimensional regularization future colliders 

分 类 号：O572.214[理学—粒子物理与原子核物理]