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There has been a steady interest in flavor anomalies and their global fits asideal probes of new physics. If the anomalies are real, one promisingexplanation is a new $Z'$ gauge boson with flavor-changing coupling to bottomand strange quarks and a flavor-conserving coupling to muons and, possibly,electrons. We point out that direct production of such a $Z'$, emerging fromthe collision of $b$ and $s$ quarks, may offer a complementary window intothese phenomena because collider searches already provide competitiveconstraints. On top of that, we analyse the same $Z'$ scenario in relation toanother long-standing discrepancy between theory and experiment that concernsthe anomalous magnetic moment of the muon. By scanning the allowed $Z'$coupling strengths in the low-mass region, we assess the compatibility of thesignals from LHCb with the $Z'$ searches in the high energy LHC data and themeasurements of the anomalous magnetic moment of the involved leptons. We alsoargue that observations of the latter can break the degeneracy pattern in theWilson coefficients $C_9$ and $C_{10}$ presented by LHCb data. The $Z'$ modelwe consider is compatible with the new measurement of $R_{K^*}$, therefore itcan potentially account for the long-standing deviations observed in$B$-physics.

Minimal flavor-changing $Z'$ models and muon $g-2$ after the $R_{K^*}$ measurement