One-loop contributions for h→ℓℓγ and e−e+→hγ in the U(1)_(B−L) extension of the standard model

作     者：Tran Dzung Tri Thanh Huy Nguyen Khiem Hong Phan Tran Dzung Tri;Thanh Huy Nguyen;Khiem Hong Phan

作者机构：Institute of Fundamental and Applied SciencesDuy Tan UniversityHo Chi Minh City 700000Vietnam Faculty of Natural SciencesDuy Tan UniversityDa Nang City 550000Vietnam VNUHCM-University of Science227 Nguyen Van CuDistrict 5Ho Chi Minh CityVietnam 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2024年第48卷第5期

页      面：23-49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 by Vietnam National Foundation for Science and Technology Development(NAFOSTED 103.01-2023.16) 

主　　题：Higgs phenomenology one-loop Feynman integrals analytic methods for quantum field theory dimensional regularization future lepton colliders 

摘      要：We present one-loop contributions for h→ℓℓγ with ℓ=νe,μ,τ,e,μ and e−e+→hγ in the U(1)_(B−L) extension of the standard model. In the phenomenological results, the signal strengths for h→ℓℓγ at the Large Hadron Collider and for e−e+→hγ at future lepton colliders are analyzed in the physical parameter space for both the vector and chiral B−L models. We found that the contributions from the neutral gauge boson Z′ to the signal strengths are rather small. Consequently, the effects will be difficult to probe at future colliders. However, the impacts of charged Higgs and CP-odd Higgs in the chiral B−L model on the signal strengths are significant and can be measured with the help of the initial polarization beams at future lepton colliders.