We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


97% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Search for heavy lepton pair production in e+ e...
View graph of relations

« Back

Search for heavy lepton pair production in e+ e- collisions at center-of-mass energies of 130-GeV and 136-GeV

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1996
<mark>Journal</mark>Physics Letters B
Number of pages10
<mark>Original language</mark>English


A search for pair production of new heavy leptons has been performed assuming different scenarios for the mixing of the new particles with Standard Model leptons. No candidate events were found in a data sample corresponding to an integrated luminosity of 5.6 pb−1 collected by the ALEPH detector at centre-of-mass energies of 130 and 136 GeV. New limits on production cross-sections and on masses of sequential leptons were obtained which significantly extend the mass regions excluded at LEP1. For instance, charged heavy leptons with masses below 63.5 GeV/c2 are excluded at 95% C.L. for mass differences to the associated neutral lepton of more than 7 GeV/c2.