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By O. Kittel

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For all scenarios we fix the sneutrino and slepton masses, mν˜ℓ = 185 GeV, ℓ = e, µ, τ , mℓ˜L = 200 GeV, ℓ = e, µ. 58), for M2 = 200 GeV, m0 = 80 GeV and tan β = 5. 3, we fix the trilinear scalar coupling parameter to Aτ = 250 GeV. The stau masses are fixed to mτ˜1 = 129 GeV and mτ˜2 = 202 GeV. In Fig. 1a we show the contour lines of the cross section for chargino production + and decay σ = σP (e+ e− → χ ˜+ ˜− ˜+ ˜ℓ ) in the M2 –ϕµ plane for |µ| = 1χ 2 ) × BR(χ 1 → ℓ ν 400 GeV and tan β = 5. The production cross section σP (e+ e− → χ ˜+ ˜− 1χ 2 ) can attain + + values from 10 fb to 150 fb and BR(χ˜1 → ℓ ν˜ℓ ), summed over ℓ = e, µ, can be as large as 50%.

6). The blank area outside the area of the contour lines is kinematically forbidden since here either √ s < mχ01 + mχ02 or mτ˜1 + mτ > mχ02 . The gray area is excluded by mχ± < 104 GeV. 1 and ACP , respectively, in the ϕµ –ϕM1 plane. The asymmetry ACP is very sensitive to variations of the phases ϕM1 and ϕµ . g. 1, we have ACP ≈ 15%. The polarization of the τ can be analyzed through its decay distributions. The sensitivities for measuring the polarization of the τ for the various decay modes are given in [43].

22a Fig. 6). The area A (B) is kinematically forbidden by mχ˜02 + mχ˜03 > s (mZ + mχ˜01 > mχ˜03 ). The gray area is excluded by mχ˜± < 104 GeV. 6) and that for ¯ attains the complete process σ = σP (e+ e− → χ ˜02 χ˜03 ) × BR(χ˜03 → Z χ ˜01 ) × BR(Z → ℓℓ) values up to 5 fb in the investigated regions of the |µ|–M2 plane in Fig. 22a. The asymmetry Aℓ , Fig. 22b, is somewhat larger than that for χ˜01 χ˜03 production and decay, and reaches at its maximum 2%. g. 5π, 0), we found Sℓ ≈ 1, for L = 500 fb−1 .

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