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

Elizabeth H. Simmons; Yumian Su

doi:10.1103/PhysRevD.54.3580

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

High Energy Physics - Phenomenology 2009-10-28 v4

Authors: Elizabeth H. Simmons , Yumian Su

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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.

Keywords

Z boson decay bottom quark U(1)_R symmetry supersymmetry top squark one-loop corrections

Cite

@article{arxiv.hep-ph/9602267,
  title  = {$Z\to b\bar b$ in $U(1)_R$ Symmetric Supersymmetry},
  author = {Elizabeth H. Simmons and Yumian Su},
  journal= {arXiv preprint arXiv:hep-ph/9602267},
  year   = {2009}
}

Comments

Corrected typos; added footnotes and a reference. 19 pages, LaTeX, includes 8 figures, full postscript version at http://smyrd.bu.edu/htfigs/htfigs.html

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

Abstract

Keywords

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