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Z decay confronts nonstandard scenarios
G BHATTACHARYYA, A RAYCHAUDHURI, A DATTA, S N GANGULI
Published in -
1990
Volume: 64
   
Issue: 24
Pages: 2870 - 2873
Abstract
We show that recent data from the CERN e+e- collider LEP on the Z line shape and decays give stringent new constraints on mixing of e and with exotics and Z-Z mixing. Even in nonstandard models, where both the visible and the invisible part of the Z width are modified, a fourth light neutrino is unlikely unless substantial mixings between neutrinos and exotics are allowed. If the gluino is detectable at the Fermilab Tevatron then the lighter-chargino mass is tightly constrained (42 GeV). © 1990 The American Physical Society.
About the journal
JournalPhysical Review Letters
Publisher-
ISSN0031-9007