A Study of BSM Physics with Leptons plus MET Final State at The LHC

Abstract

he work wen o. he sudy is based on a daase expeced by he minimal supersymmeric exension of he Sandard model (MSSM) of √s=14 eV pp collisions a he LHC, corresponding o an inegraed luminosiy of 139 fb^(-1).he calculae of he cross secion, limi of mass and kinmaic disrbuion for he chargino-nuralino pair producion a LHC is presened. he resuls are compared wih he laes resuls recorded by ALAS and LHC a √s=8,13,14 eV in hree-lepon final saes. In he minimal supersymmeric exension of he SM (MSSM) he mass parameers for he bino, wino, and higgsino saes represened by M_1, M_2, and µ. Our resuls depend on he naure of he chargino-nuralino pair producion and is masses. In case of ligh higgsino like slepons he oal cross secion produced a small x, while for gauginos like s-quarks produced a large x due o he fac ha gaugino consrained by CMS and ALAS as heavier han 1 eV. Assuming ha he lighes supersymmeric paricle (LSP) χ ̃_1^0 is sable wih R-pariy conservaion, i is a well-moivaed o viable dark-maer candidae. wo scenarios of chargino-nuralino pair producion are considered in his search. he firs scenario Higgsino like wih wo condiions on he wino-bino and higgsino mass parameers [(M_1<M_2<µ)and(M_1<M_2<-µ)]. he second scenario gaugino like wih wo condiions on he wino-bino and higgsino mass parameers [(M_1<-µ<M_2)and(-µ<M_1<M_2)]. Also, he effec of he sign and value of µ on he oal cross secions for higgsino and gaugino is presened. Resuls are graphed and abulaed. Also, mass limis are expeced on χ ̃_1^0 .