A wide scalar neutrino resonance and b\bar{b} production at LEP

Details A wide scalar neutrino resonance and b\bar{b} production at LEP A wide scalar neutrino resonance and b\bar{b} production at LEP

1996-12-18

arxiv.org/abs/hep-ph/9612397v2

Phys.Rev.Lett. 78 (1997) 3063-3066

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages. LaTex + RevTex. Revised to include a discussion of ISR effects. Version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.78.3063

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 b\bar{b} 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 m_Z, such a resonance necessarily increases R_b and reduces A_{FB}(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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