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 

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 [3]VNUHCM-University of Science,227 Nguyen Van Cu,District 5,Ho Chi Minh City,Vietnam

出　　处：《Chinese Physics C》2024年第5期23-49,共27页中国物理C（英文版）

基　　金：Supported by Vietnam National Foundation for Science and Technology Development(NAFOSTED,103.01-2023.16)。

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.

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

分 类 号：O57[理学—粒子物理与原子核物理]