Muon g−2 with SU(2)L multiplets  

作　　者：Takaaki Nomura Hiroshi Okada 

机构地区：[1]College of Physics,Sichuan University,Chengdu 610065,China [2]Department of Physics,Henan Normal University,Xinxiang 453007,China [3]Asia Pacific Center for Theoretical Physics(APCTP),Pohang 790-784,Korea [4]Department of Physics,Pohang University of Science and Technology,Pohang 37673,Korea

出　　处：《Chinese Physics C》2025年第4期28-39,共12页中国物理C(英文版)

基　　金：supported by an appointment to the JRG Program at the APCTP through the Science and Technology Promotion Fund and Lottery Fund of the Korean Government,the Korean Local Governments-Gyeongsangbuk-do Province and Pohang City(H.O.);the Fundamental Research Funds for the Central Universities(T.N.)。

摘　　要：We propose a simple model to obtain a sizable muon anomalous magnetic dipole moment(muon g-2)that introduces several SU(2)_(L) multiplet fields without any additional symmetries.The neutrino mass matrix is simply induced via a type-II seesaw scenario in terms of SU(2)_(L) triplet Higgs with U(1)γ hypercharge 1.In addition,we introduce an SU(2)_(L) quartet vector-like fermion with hypercharge 1/2 and scalar with hypercharge 3/2.The quartet fermion plays a crucial role in explaining muon g-2 causing the chiral flip inside a loop diagram with the mixing of triplet and quartet scalar bosons via the standard model Higgs.We conduct a numerical analysis and search for the allowed region in our parameter space and demonstrate the collider physics.

关 键 词：muon anomalous magnetic moment lepton flavor violation extended Higgs sector 

分 类 号：O572.2[理学—粒子物理与原子核物理]