Radiative corrections to chargino production in electron-positron collisions

1997/11/12 by Marco A. Diaz, Marco Diaz, Steve F. King +1 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph

paper · pdf · doi:10.1016/s0550-3213(98)00611-7

published as Nucl.Phys. B529 (1998) 23-61 · 44 pages including 22 figures, Latex

arxiv created 1997/11/12 · openalex publication_date 1998/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We discuss the one-loop radiative corrections to the reaction e⁺ e^- -> X⁺_a X^-_b, for a,b=1,2 where X⁺_1,2 are the charginos of the minimal supersymmetric standard model. We calculate the leading one loop radiative corrections involving loops of top, stop, bottom and sbottom quarks, working in the MS-bar scheme. At LEP2 we find positive radiative corrections typically of 10% to 15% and with a maximum value of approximately 30% if the squark mass parameters are of the order of 1 TeV. If √(s)=500 GeV we find smaller corrections but they can be also negative, with extreme values of 13% and -4%. For a center of mass given by √(s)=2 TeV we find larger corrections, with typical values between 20% and -20%.

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