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Search for excited neutrinos in Z decay

Research output: Contribution to journalJournal article

Published

Journal publication date1990
JournalPhysics Letters B
Journal number1-2
Volume250
Number of pages11
Pages172-182
Original languageEnglish

Abstract

Excited neutrinos decaying into a neutrino and a photon are searched for in the ALEPH detector at LEP. No evidence is found for Z decay into v̄v∗ or v̄∗v∗ final states. Upper limits are derived on excited neutrino couplings up to excited neutrino masses close to the Z mass. Lower limits on the v∗ mass, independent of the v∗ decay modes, are deduced from the total Z width.