Escobar, C. O.Peres, O. L G [UNESP]Pleitez, V. [UNESP]Funchal, R. Zukanovich2014-05-272014-05-271993-12-01Physical Review D, v. 47, n. 5, 1993.0556-2821http://hdl.handle.net/11449/64420We study the constraints on masses and mixing angles imposed by the measured Z0 invisible width, in a model in which a singlet right-handed neutrino mixes with all the standard model neutrinos. © 1993 The American Physical Society.engArtigo10.1103/PhysRevD.47.R1747WOS:A1993KT88000004Acesso restrito2-s2.0-28425923022-s2.0-2842592302.pdf67834333902357270000-0001-5279-8438