par Abreu, Pedro;Bertrand, Daniel 
; [et al.]
Référence European Physical Journal C. Particles and Fields, 8, page (41-58)
Publication Publié, 1999
; [et al.]Référence European Physical Journal C. Particles and Fields, 8, page (41-58)
Publication Publié, 1999
Article révisé par les pairs
| Résumé : | A search for unstable heavy fermions with the DELPHI detector at LEP is reported. Sequential and non-canonical leptons, as well as excited leptons and quarks, are considered. The data analysed correspond to an integrated luminosity of about 48 pb-1 at an e+e- centre-of-mass energy of 183 GeV and about 20 pb-1 equally shared between the centre-of-mass energies of 172 GeV and 161 GeV. The search for pair-produced new leptons establishes 95% confidence level mass limits in the region between 70 GeV/c2 and 90 GeV/c2, depending on the channel. The search for singly produced excited leptons and quarks establishes upper limits on the ratio of the coupling of the excited fermion to its mass (λ/mf*) as a function of the mass. |
