A private SUSY 4HDM with FCNC in the up-sector  

作　　者：M.A.Arroyo-Ureña Lorenzo Díaz-Cruz Bryan O.Larios-López M.A.Pérez de León 

机构地区：[1]Facultad de Estudios Superiores Cuautitlan-UNAM Cuautitlan,Edo de Mex,México [2]Mesoamerican Center for Theoretical Physics,UNACH,Chiapas,México [3]CIFFU and Facultad de Ciencias Físico-Matemáticas,Benemérita Universidad Autónoma de Puebla ApdoPostal 1364,CP72000,Puebla,PueMéxico [4]Departamento de Gravitación y Altas Energías,Facultad de Ciencias Universidad Nacional Autónoma de Honduras Ciudad Universitaria,Tegucigalpa MDCHonduras

出　　处：《Chinese Physics C》2021年第2期326-340,共15页中国物理C（英文版）

摘　　要：We present a SUSY model with four Higgs doublets of the"private type,"in which all fermion types(up,down,and charged leptons)obtain their masses from a different Higgs doublet H_f(f=u_1,d,e) .The conditions for anomaly cancellation imply that the remaining Higgs doublet of the model( H_(u_2) )must have the same hypercharge as H_(u_1) ,and thus,can only couple to up-type quarks,which opens the possibility to have FCNCs only in this sector.We study the Lagrangian of the model,and in particular,the Higgs potential,to identify the Higgs mass-eigenstates and their interactions;for the Yukawa matrices,we consider the four-texture case.We obtain constraints on the model parameters by using LHC measurements on the properties of the 125 GeV Higgs boson(h),and identify viable regions of the parameter space.Subsequently,these constraints are used to evaluate the prospects for detecting the FCNC decay mode t→ch at the future high-luminosity(HL)option for the LHC,which are compared with current limits from LHC-run2.Moreover,we evaluate the FCNC decay of the next heavier Higgs boson H_(2)→tc ,which can typically reach BR(H_2→tc)≈(10^(-4)-10^(-5)) .The search for the signal at HL-LHC is also studied,and it is found that it may be detectable for specific regions of the model parameter space.

关 键 词：Higgs physics top quark SUPERSYMMETRY collider physics 

分 类 号：O572.3[理学—粒子物理与原子核物理]