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Supersymmetric effects in top quark decay into polarized W-boson | | Junjie Cao
; Robert J. Oakes
; Fei Wang
; Jin Min Yang
; | | Date: |
27 Jun 2003 | | Journal: | Phys.Rev. D68 (2003) 054019 | | Subject: | hep-ph | | Abstract: | We investigate the one-loop supersymmetric QCD (SUSY-QCD) and electroweak (SUSY-EW) corrections to the top quark decay into a b-quark and a longitudinal or transverse W-boson. The corrections are presented in terms of the longitudinal ratio Gamma(t-->W_L b)/Gamma(t--> W b) and the transverse ratio Gamma(t-->W_- b)/Gamma(t--> W b). In most of the parameter space, both SUSY-QCD and SUSY-EW corrections to these ratios are found to be less than 1% in magnitude and they tend to have opposite signs. The corrections to the total width Gamma(t-->W b) are also presented for comparison with the existing results in the literature. We find that our SUSY-EW corrections to the total width differ significantly from previous studies: the previous studies give a large correction of more than 10% in magnitude for a large part of the parameter space while our results reach only few percent at most. | | Source: | arXiv, hep-ph/0306278 | | Services: | Forum | Review | PDF | Favorites | |
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