%0 Report
%A Moreau, G.
%T Single chargino production at linear colliders
%N hep-ph/0009140
%M PUBDB-2023-04144
%M hep-ph/0009140
%M LC-TH-2000-040
%M SACLAY-SPH-T-00-129
%P 24
%D 2000
%Z In *2nd ECFA/DESY Study 1998-2001* 1002-1025. 24 pages, Latex file. Linear Collider note LC-TH-2000-040 Report-no: T00/129
%X We study the single chargino production e<sup>+</sup> e<sup>−</sup> → ~χ<sup>±</sup> μ<sup>±</sup> at linear colliders which occurs through the λ<sub>121</sub> 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=500 GeV and a luminosity of <span style="font-family:helvetica"><i>L</i>=500 fb<sup>−1</sup>, the sensitivities on the λ<sub>121</sub> coupling constant obtained from the single chargino production study improve the low-energy experimental limit over a range of ∆m<sub>~ν</sub>  ≈ 500 GeV around the sneutrino resonance, and reach values of  ∼ 10<sup>−4</sup> at the ~ν pole. The single chargino production also allows to reconstruct the ~χ<sub>1</sub><sup>±</sup>, ~χ<sub>2</sub><sup>±</sup> and ~ν masses. The initial state radiation plays a fundamental role in this study.
%K electron positron: annihilation (INSPIRE)
%K chargino: electroproduction (INSPIRE)
%K coupling constant (INSPIRE)
%K R parity: violation (INSPIRE)
%K supersymmetry (INSPIRE)
%K beam: polarization (INSPIRE)
%K sparticle: mass spectrum (INSPIRE)
%K muon+ muon-: annihilation (INSPIRE)
%K muon: transverse momentum (INSPIRE)
%K chargino: decay modes (INSPIRE)
%K final state: (4lepton) (INSPIRE)
%K final state: (3lepton 2jet) (INSPIRE)
%K numerical calculations (INSPIRE)
%K bibliography (INSPIRE)
%K electron positron --> chargino muon (INSPIRE)
%F PUB:(DE-HGF)29
%9 Report
%R 10.3204/PUBDB-2023-04144
%U https://bib-pubdb1.desy.de/record/587087