A SEARCH FOR NEW QUARKS AND LEPTONS FROM Z ° DECAY AT LEP ALEPH Collaboration

linear multistep method, charged particle, magnetic field, energy conservation, backward error analysis, modified differential equation, modulated Fourier

Figure 3 presents the distribution used for the reconstruction of the mass of the excited lepton candidates, namely the lepton recoil mass in the case of charged excited leptons and

A search for pair-produced charged Higgs bosons is performed with the L3 detec- tor at LEP using data collected at centre-of-mass energies between 189 and 209 GeV, corresponding to

29 Institute of Theoretical and Experimental Physics, ITEP, Moscow, Russia 30 INFN-Sezione di Napoli and University of Naples, I-80125 Naples, Italy 31 Department of Natural

Unstable heavy lepton signatures are characterized by hadronic jets, isolated leptons, and missing energy and transverse momentum.. An electron is identified as a cluster in

Heavy singlet neutrinos have been searched for in leptonic decays of mesons and in neutrino beam experiments [3], leading to stringent upper limits on the square of the

These follow from uncertainties in the determination of the energy scale of the detector, on the event selection and lepton identification criteria, on Monte Carlo statistics and on

For both selections, to reject the two-photon background, the multiplicity of charged tracks is required to be greater than 2, the number of jets and isolated leptons to be at least