Neutrino counting at the Z peak in extended electroweak models

Jo Anne L. Hewett

doi:10.1016/0370-2693(90)92106-S

Neutrino counting at the Z peak in extended electroweak models

Jo Anne L. Hewett

Institute for Theoretical Physics

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Abstract

The consequences of mixing between the standard model Z and a possible extra neutral gauge boson, Z', on neutrino counting at the Z peak are investigated. Our results are presented in the number of light neutrino generations (V_v), and total Z width (Γ_z) plane. We find that a large range of values are possible, including the case where one of these quantities takes on its three-generation SM valur while the other does not. Z-Z′ mixing does not appear to be able to conceal a fourth generation of light neutrinos.

Original language	English
Pages (from-to)	98-102
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	238
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(90)92106-S
State	Published - Mar 29 1990

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10.1016/0370-2693(90)92106-S

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abstract = "The consequences of mixing between the standard model Z and a possible extra neutral gauge boson, Z', on neutrino counting at the Z peak are investigated. Our results are presented in the number of light neutrino generations (Vv), and total Z width (Γz) plane. We find that a large range of values are possible, including the case where one of these quantities takes on its three-generation SM valur while the other does not. Z-Z′ mixing does not appear to be able to conceal a fourth generation of light neutrinos.",

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N2 - The consequences of mixing between the standard model Z and a possible extra neutral gauge boson, Z', on neutrino counting at the Z peak are investigated. Our results are presented in the number of light neutrino generations (Vv), and total Z width (Γz) plane. We find that a large range of values are possible, including the case where one of these quantities takes on its three-generation SM valur while the other does not. Z-Z′ mixing does not appear to be able to conceal a fourth generation of light neutrinos.

AB - The consequences of mixing between the standard model Z and a possible extra neutral gauge boson, Z', on neutrino counting at the Z peak are investigated. Our results are presented in the number of light neutrino generations (Vv), and total Z width (Γz) plane. We find that a large range of values are possible, including the case where one of these quantities takes on its three-generation SM valur while the other does not. Z-Z′ mixing does not appear to be able to conceal a fourth generation of light neutrinos.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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ER -

Neutrino counting at the Z peak in extended electroweak models

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