Δk' v and ΔQ V (V =γ, Z) form factors in the Georgi-Machacek model

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Arroyo-Urena, M.A.^1 ; Hernández-Tomé, G.^1 ; Tavares-Velasco, G.^1

Facultad de Ciencias Fisico Matemáticas, Benemérita Universidad Autónoma de Puebla, Apartado postal 1152, Pue., Puebla

72001, Mexico^1

关键词: Form factors;    General expression;    Scalar function;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012010/pdf
DOI  :  10.1088/1742-6596/761/1/012010

来源: IOP

【 摘 要 】

The CP-even static form factors Δk'vand ΔQv(V =γ, Z) associated with the WWV vertex are studied in the context of the Georgi-Machacek model (GMM), which predicts nine new scalar bosons accommodated in a singlet, a triplet and a fiveplet. General expressions for the one-loop contributions to Δk'vand ΔQvarising from neutral, singly and doubly charged scalar bosons are obtained in terms of both parametric integrals and Passarino- Veltman scalar functions, which can be numerically evaluated. It is found that the GMM yields 15 (28) distinct contributions to Δk'γ and ΔQγ (Δk'zand ΔQz), though several of them are naturally suppressed.