CERN Accelerating science

Preprint
Report number	CERN-OPEN-99-340
Title	Search for pair production of unstable heavy leptons in $e^{+}e^{-}$ collisions at centre-of-mass energies of 161 and 172 GeV
Author(s)	Büscher, V (CERN)
Publication	1997
Collaboration	ALEPH Collaboration
Imprint	29 Jul 1997
Number of pages	5
Presented at	International Europhysics Conference on High-Energy Physics, Jerusalem, Israel, 19 - 25 Aug 1997
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; ALEPH
Keywords	e+ e-
Abstract	The data collected at 161 and 172 GeV by ALEPH at LEP, corresponding to an integrated luminosity of about 22 pb-1, are analysed in a search for pair-production of heavy leptons. No evidence for a signal was found. New limits on production cross-sections and on masses of sequential leptons are set, which significantly improve existing limits from searches at LEP1.5.
Submitted by	catherine.cart@cern.ch