The loop effects on the chargino decays ${\tilde{\chi }}_1^{\pm }\to {\tilde{\chi }}_1^{0}f{f}^{\prime }$ in the MSSM

Abstract

The lighter chargino three body decays ${\tilde{\chi }}_1^{\pm }\to {\tilde{\chi }}_1^{0}f{f}^{\prime }$ via the $W^{\pm }$ boson and the charged Higgs boson $H^{\pm }$ are studied in the R-parity conserved Minimal Supersymmetric Standard Model (MSSM). We treat ${\tilde{\chi }}_1^{\pm }$ decays as production and decay of $W^{\pm }$ and $H^{\pm }$: i.e., ${\tilde{\chi }}_1^{\pm }\to {\tilde{\chi }}_1^0{W}^{\pm }(H^{\pm })\to {\tilde{\chi }}_1^{0}f{f}^{\prime }$. Both higgsino-like and wino-like ${\tilde{\chi }}_1^{\pm }$ decays are well investigated. These decays are calculated at 1-loop level and the loop corrections are found to be less than three percent.The signal of the charged Higgs $H^{\pm }$ production from ${\tilde{\chi }}_1^{\pm }$ decays are discussed. It will offer important information about the chargino and neutralino sector, as well as the charged Higgs sector in the MSSM.

Comments: 13 pages, 3 figures