Heavy Leptons At The Lhc

Content:The standard model(SM)is based on the gauge symmetries SU(3)C×SU(2)L×U(1)Y and Higgs mech-anism.Althongh it has been proved by some experiments,we have not find the Higgs boson which cause the symmetry break spontaneously. SM describes strong,weak and electromagnetic interactions,via the exchange of the corresponding spin-1 gauge fields:8 massless gluons and 1 massless photon for the strong and electromagnetic inter-actions,respectively,and 3 massive bosons,W±and Z,for the weak interaction.SM predict the neutrino is massless,but Solar and atmospheric data directly show that the neutrino has mass and there are oscillation within the different generations.So SM is not perfect and it also have other problems,such as too many free parameters, triviality,and unnaturalness,etc.So people proposed some new physics to solove the SM problems.The seesaw mechanism can explain the neutrino mass problem,at the same time predict a heavy lepton's existence.Many new physics models have been discussed the heavy lepton problem,such as technicolor model,3-3-1 model and Little Higgs model.But within the LHT model there is no one study this work.Our work is based on the T-odd heavy lepton produced within the LHT model.T-odd heavy lepton can be produced via the subprocesses gg→lH+lH-, qq→lH+lH-,γγ→lH+lH- and VV→lH+lH-(V=W or Z)at the LHC We calaculate the cross sections of these processes and give some discussion.We found that the cross section are all small,only the Drell-Yan process qq→lH+lH- cross section is bigger than other processes,whicb can reach 270 fb. Ifthe LHC year luminosity￡int=100 fb-1,(?)=14 TeV, then there will be thousands of lH+lH- events produced at LHC experiment every year.And this is important for the LHC experiment test ofthe Little Higgs theory and LHT model.