Z-->bb-bar in U(1)R symmetric supersymmetry.
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Z-->bb-bar in U(1)R symmetric supersymmetry.

  • Author(s): Simmons, EH;
  • Su, Y
  • et al.
Abstract

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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