Invisible Z decay width bounds on active-sterile neutrino mixing in the (3+1) and (3+2) models

Details Invisible Z decay width bounds on active-sterile neutrino mixing in the (3+1) and (3+2) models Invisible Z decay width bounds on active-sterile neutrino mixing in the (3+1) and (3+2) models

2007-06-08

arxiv.org/abs/0706.1227v1

Mod.Phys.Lett.A24:475-483,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

10.1142/S0217732309028345

In this work we consider the standard model extended with singlet sterile neutrinos with mass in the eV range and mixed with the active neutrinos. The active-sterile neutrino mixing renders new contributions to the invisible Z decay width which, in the case of light sterile neutrinos, depends on the active-sterile mixing matrix elements only. We then use the current experimental value of the invisible Z decay width to obtain bounds on these mixing matrix elements for both (3+1) and (3+2) models.

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