A wide scalar neutrino resonance and bb production at LEP
Jens Erler, Jonathan L. Feng, Nir Polonsky
Abstract
In supersymmetric models with R-parity violation, scalar neutrinos may be produced as s-channel resonances in e+e- colliders. We note that within current constraints, the scalar neutrino may have a width of several GeV into bb and be produced with large cross section, leading to a novel supersymmetry discovery signal at LEP II. In addition, if the scalar neutrino mass approximately equals mZ, such a resonance necessarily increases Rb and reduces AFB(b), significantly improving the fit to electroweak data. Bounds from B meson and top quark decays are leading constraints, and we stress the importance of future measurements.
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