Supersymmetric QCD corrections to the W-boson width

Details Supersymmetric QCD corrections to the W-boson width Supersymmetric QCD corrections to the W-boson width

1996-10-08

arxiv.org/abs/hep-ph/9610284v1

Phys.Lett.B391:351-354,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, LaTeX file with 2 figures, uses epsf macros

Scientific paper

10.1016/S0370-2693(96)01494-3

We calculate the one-loop supersymmetric QCD corrections to the width of the $W$-boson. We find that these are of order $\sim {{ \alpha_s} \over {\pi}} {1 \over 20} { {M^2_W} \over {M_S^2}} \Gamma_{u {\bar d}}$, where $M_S$ is the supersymmetry breaking scale and $ \Gamma_{u {\bar d}}$ the tree level hadronic width for $W^+ \rightarrow u {\bar d} $. Due to the appearance of the suppression factor $\sim {1 \over 20}$ these are at least two orders of magnitude smaller than the standard QCD corrections $\sim {{ \alpha_s} \over {\pi}} \Gamma_{u {\bar d}}$ and hence of the order of the two-loop electroweak effects. Therefore supersymmetric QCD corrections will only be of relevance once experiments reach that level of accuracy.

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