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# R-b and R-l in MSSM without R-parity

## Abstracts

 We examined Zb (b) over bar and Zl (l) over bar couplings in the minimal supersymmetric model with explicit trilinear R-parity violating interactions. We found that the top quark couplings lambda (i3k)' and lambda (3j3)" can give sizable contributions through top quark loops. When deriving the bounds from R-b and R-l data, we also take into account the loop contributions of R-parity conserving interactions. The bounds from R-l are found to be stronger than those from R-b and serve as the hitherto strongest bounds for some couplings.
Journal:EUROPEAN PHYSICAL JOURNAL C
Recommended references： Yang, Jin Min.(2016).R-b and R-l in MSSM without R-parity.EUROPEAN PHYSICAL JOURNAL C.[ChinaXiv:201605.01761] (Click&Copy)
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