The loop effects on the chargino decays χ~1±→χ~10ff′ in the MSSM

• Published in: Chinese science bulletin Vol. 59; no. 17; pp. 1968 - 1977
• Main Authors: Xu, Qingjun, Xu, Shusheng, Xiao, Zhenjun, Jin, Ligang
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 2014
• Subjects: Chemistry/Food Science; Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; multidisciplinary; Physics; Science; Science (multidisciplinary); Supersymmetry; One-loop correction; Chargino
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-014-0289-3

The lighter chargino three body decays χ ~ 1 ± → χ ~ 1 0 f f ′ via the W ± boson and the charged Higgs boson H ± were studied in the R -parity conserved Minimal Supersymmetric Standard Model (MSSM). We treat χ ~ 1 ± decays as production and decay of W ± and H ± : i.e., χ ~ 1 ± → χ ~ 1 0 W ± ( H ± ) → χ ~ 1 0 f f ′ . Both higgsino-like and wino-like χ ~ 1 ± decays were 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 ± production from χ ~ 1 ± decays is discussed. It will offer important information about the chargino and neutralino sector, as well as the charged Higgs sector in the MSSM.