Some constraints on neutral heavy leptons from flavor-conserving decays of the Z boson
arXiv:hep-ph/9503248 · doi:10.1103/PhysRevD.51.3569
Abstract
Small neutrino masses can arise in some grand unified models or superstring theories. We consider a model with an enhanced fermion sector containing Dirac neutral heavy leptons. The dependence on the mass and mixing parameters of these new fermions is investigated for several measurable quantities. We study the flavor-conserving leptonic decays of the Z boson and universality breaking in these decays. We also consider the W boson mass dependence on neutral heavy lepton parameters.
20 pages, Revtex 3.0, 6 uuencoded and compressed postscript figures included. Compressed postscript file of paper, including figures, also available by anonymous ftp at ftp://ftp.physics.carleton.ca/pub/theory/gour/ocipc9411.ps.Z . Accepted for publication in Phys. Rev. D.
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- Cumulative Non-Decoupling Effects of Kaluza-Klein Neutrinos in Electroweak Processes
- Anatomy of F_D-Term Hybrid Inflation
- The Little Review on Leptogenesis
- Electroweak Resonant Leptogenesis in the Singlet Majoron Model
- Gauge and Scheme Dependence of Mixing Matrix Renormalization
- The Oblique Corrections from Heavy Scalars in Irreducible Representations
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- On-shell renormalization of the mixing matrices in Majorana neutrino theories