分类: 物理学 >> 基本粒子与场物理学 提交时间: 2016-05-16
摘要: 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.
分类: 物理学 >> 基本粒子与场物理学 提交时间: 2016-05-16
摘要: We discuss single top quark production via u(i) (d) over bar(j)-->t (b) over bar at the Fermilab Tevatron in the minimal supersymmetric model with R-parity violation. We find that within the allowed range of coupling constants, the lepton-number-violating couplings can give rise to observable effects when the slepton mass lies in a specific narrow range. For the baryon number-violating couplings, the contribution to the production rate can be quite large in the presently allowed range of the coupling constants. We show that the measurement of single top quark production at the upgraded Tevatron can be used to constrain a linear combination of products of the R-parity-violating couplings.