Radiative Corrections to Neutralino and Chargino Masses in the Minimal Supersymmetric Model
Damien Pierce, Aris Papadopoulos
Abstract
We determine the neutralino and chargino masses in the MSSM at one-loop. We perform a Feynman diagram calculation in the on-shell renormalization scheme, including quark/squark and lepton/slepton loops. We find generically the corrections are of order 6%. For a 20 GeV neutralino the corrections can be larger than 20%. The corrections change the region of μ,\ M2,\ β parameter space which is ruled out by LEP data. We demonstrate that, e.g., for a given μ and β the lower limit on the parameter M2 can shift by 20 GeV.
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