Single chargino production at linear colliders

الأصل · EN

We study the single chargino production e+ e- → χ± μ∓ at linear colliders which occurs through the ł₁₂₁ R-parity violating coupling constant. We focus on the final state containing 4 leptons and some missing energy. The largest background is and can be reduced using the initial beam polarization and some cuts based on the specific kinematics of the single chargino production. Assuming the highest allowed supersymmetric background, a center of mass energy of √ s=500GeV and a luminosity of L=500fb⁻¹, the sensitivities on the ł₁₂₁ coupling constant obtained from the single chargino production study improve the low-energy experimental limit over a range of Δm ν ≈ 500GeV around the sneutrino resonance, and reach values of 10⁻⁴ at the ν pole. The single chargino production also allows to reconstruct the χ₁±, χ₂± and ν masses. The initial state radiation plays a fundamental role in this study.