All Results

Supersymmetric electroweak corrections to single top quark production at the Fermilab Tevatron

Li, CS; Oakes, RJ; Yang, JM; Zhou, HYSubjects: Physics >> The Physics of Elementary Particles and Fields

We calculate the O(alpha(cw)M(t)(2)/M-W(2)) supersymmetric (SUSY) electroweak corrections to single top quark production via --> |

Yukawa corrections to top quark pair production in photon-photon collisions

Li, CS; Yang, JM; Zhu, YL; Zhou, HYSubjects: Physics >> The Physics of Elementary Particles and Fields

The O(alpha m(t)(2)/m(w)(2)) Yukawa corrections to top quark pair production in photon-photon collisions ate calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM), as well as the minimal supersymmetric model (MSSM). We found that the correction to the cross section can only reach a few percent in the SM, but can be quite significant (> 10%) in the 2HDM and MSSM for favorable parameter values, which may be observable at high energy e(+)e(-) colliders. |

One-loop QCD corrections to top quark decay into a neutralino and light stop squark

Li, CS; Oakes, RJ; Yang, JM; Zhou, HYSubjects: Physics >> The Physics of Elementary Particles and Fields

We calculate the one-loop QCD corrections to t-->(t) over tilde(1)<(chi)over tilde>(0)(j) using the dimensional reduction scheme, including QCD and supersymmetric QCD corrections. The analytic expressions for the corrections to the decay width are given, which can easily be extended to t--><(chi)over tilde>(+)(j)(b) over tilde(i). The numerical results show that the correction amounts to more than a 10% reduction in the partial width relative to the tree level result. We also compare the corrections in the no-mixing top squark case with those in the mixing top squark case. |

Supersymmetric QCD corrections to single top quark production at the Fermilab tevatron

Li, CS; Oakes, RJ; Yang, JM; Zhou, HYSubjects: Physics >> The Physics of Elementary Particles and Fields

We evaluate the supersymmetric QCD corrections to single top quark production via q (q) over bar'-->t (b) over bar at the Fermilab Tevatron in the minimal supersymmetric model. We find that within the allowed range of squark and gluino masses the supersymmetric QCD corrections can enhance the cross section by a few percent. The combined effects of SUSY QCD, SUSY EW, and the Yukawa couplings can exceed 10% for the smallest allowed tan beta(similar or equal to 0.25) but are only a few percent for tan beta>1. |

[1 Pages/ 4 Totals]