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Analysis derives bounds on flavor-violating couplings of Z boson to quarks, suggesting low-energy experiments offer stronger constraints than colliders.
We derive bounds on the flavor-violating (FV) couplings of the [Formula: see text] boson to quarks and present future sensitivity projections. Our analysis shows that the current bounds on the FV couplings are [Formula: see text] for the [Formula: see text] couplings to [Formula: see text] and [Formula: see text], [Formula: see text] for [Formula: see text], [Formula: see text] for [Formula: see text], and [Formula: see text] for [Formula: see text] and [Formula: see text]. Overall, low-energy flavor experiments provide significantly stronger constraints on these FV couplings than current collider searches.
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Abu-Ajamieh et al. (2026) studied this question.
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