$Z\to b\bar b$ in $U(1)_R$ Symmetric Supersymmetry

Details $Z\to b\bar b$ in $U(1)_R$ Symmetric Supersymmetry $Z\to b\bar b$ in $U(1)_R$ Symmetric Supersymmetry

1996-02-09

arxiv.org/abs/hep-ph/9602267v4

Phys.Rev. D54 (1996) 3580-3586

Physics

High Energy Physics

High Energy Physics - Phenomenology

Corrected typos; added footnotes and a reference. 19 pages, LaTeX, includes 8 figures, full postscript version at http://smy

Scientific paper

10.1103/PhysRevD.54.3580

We compute the one-loop corrections to the $Z \to b\bar{b}$ vertex in the $U(1)_R$ symmetric minimal supersymmetric extension of the standard model. We find that the predicted value of $R_b$ is consistent with experiment if the mass of the lighter top squark is no more than 180 GeV. Furthermore, other data combines to place a lower bound of 88 GeV on the mass of the light top squark. A top squark in this mass range should be accessible to searches by experiments at FNAL and LEP.

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