Lepton mass matrix from double covering of A_(4) modular flavor symmetry  

作　　者：Hiroshi Okada Yuta Orikasa 

机构地区：[1]Asia Pacific Center for Theoretical Physics(APCTP)-Headquarters San 31,Hyoja-dong,Nam-gu,Pohang 790-784,Korea [2]Department of Physics,Pohang University of Science and Technology,Pohang 37673,Republic of Korea [3]Institute of Experimental and Applied Physics,Czech Technical University in Prague,Husova 240/5,11000 Prague 1,Czech Republic

出　　处：《Chinese Physics C》2022年第12期162-171,共10页中国物理C（英文版）

基　　金：supported by the Junior Research Group (JRG) Program at the Asia-Pacific Center for Theoretical Physics (APCTP) through the Science and Technology Promotion Fund and Lottery Fund of the Korean Government;supported by the Korean Local Governments-Gyeongsangbuk-do Province and Pohang City;supported from European Regional Development Fund-Project Engineering Applications of Microworld Physics (No.CZ.02.1.01/0.0/0.0/16_019/0000766)

摘　　要：We study a double covering of modular A_(4)flavor symmetry.To this end,we construct lepton models for canonical and radiative seesaw scenarios.Using irreducible doublet representations,heavier Majorana fermion masses are characterized by one free parameter that would differentiate from A_(4)symmetry.symmetry.Throughχsquare numerical analysis,we demonstrate that both scenarios produce some predictions in case of normal hierarchy reproducing neutrino oscillation data.However,no solution satisfies the neutrino oscillation data in case of radiative seesaw of inverted hierarchy.

关 键 词：flavor physics neutrino and Lepton mass beyond the standard model 

分 类 号：O572.32[理学—粒子物理与原子核物理]