Z decay confronts nonstandard scenarios

Bhattacharyya, Gautam ; Raychaudhuri, Amitava ; Datta, Amitava ; Ganguli, S. N. (1990) Z decay confronts nonstandard scenarios Physical Review Letters, 64 (24). pp. 2870-2873. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v64/i24/p2870_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.64.2870


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 t 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).

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:15044
Deposited On:13 Nov 2010 13:05
Last Modified:31 May 2011 09:22

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