Constraints on SMEFT Operators from Z Decay
Published:Dec 29, 2025 06:05
•1 min read
•ArXiv
Analysis
This paper is significant because it explores a less-studied area of SMEFT, specifically mixed leptonic-hadronic Z decays. It provides complementary constraints to existing SMEFT studies and offers the first process-specific limits on flavor-resolved four-fermion operators involving muons and bottom quarks from Z decays. This contributes to a more comprehensive understanding of potential new physics beyond the Standard Model.
Key Takeaways
- •Analyzes Z → μμbb decays within the SMEFT framework.
- •Derives constraints on dimension-six operators.
- •Provides complementary constraints to existing SMEFT studies.
- •Yields the first process-specific limits on flavor-resolved four-fermion operators involving muons and bottom quarks from Z decays.
Reference
“The paper derives constraints on dimension-six operators that affect four-fermion interactions between leptons and bottom quarks, as well as Z-fermion couplings.”