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One-loop sfermion corrections to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>W</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:…
We study one-loop effects of sfermions on helicity amplitudes for ${e}^{\ensuremath{-}}{e}^{+}\ensuremath{\rightarrow}{W}^{\ensuremath{-}}{W}^{+}$ in the minimal supersymmetric standard model. The one-loop contributions are calculated in the modified minimal subtraction scheme $(\overline{\mathrm{MS}})$ renormalization scheme. In order to verify the validity of the analytic calculation and the numerical program, the following tests are performed. …