Events with large missing transverse energy at the cern collider: II. search for the decays of W± into heavy leptons and of Z0 into non-interacting particles

UA1 Collaboration, R. Edgecock

Research output: Contribution to journalArticle

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Abstract

We report on further analysis of events with large missing transverse energy from 715 nb-1 of data from the UA1 experiment at the CERN proton-antiproton collider. Measured W and Z0 rates and heavy flavour cross sections are used to predict rates of missing transverse energy event from all known standard model process. Limits are derived on two possible new sources, namely: (1) semi-hadronic decays of a fourth sequential charged heavy lepton coupling to the W boson, (2) Z0 decays into additional pairs of non-interacting particles. After taking into additional pairs of non-interacting particles. After taking into account all known sources of missing transverse energy events, we find a mass limit on a fourth-generation charged lepton of mL>41 GeV/c2 (90% CL) and a limit on the number of additional neutrino species of n≤7 (90% CL).

Original languageEnglish
Pages (from-to)241-248
Number of pages8
JournalPhysics Letters B
Volume185
Issue number1-2
DOIs
Publication statusPublished - 12 Feb 1987
Externally publishedYes

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