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We explore single and double flavor-violating scalars (flavons) production atthe 13 and 14 TeV LHC in an effective field theory formulation where flavonsalways change the flavor of Standard Model fermions. When those scalars coupleto mass, their flavor-changing couplings to top quarks and tau leptons arefavored. Focusing on the mass region below the top quark mass, we findcouplings that fit the muon and electron $(g-2)$ discrepancies and avoidseveral current experimental constraints. We determine the potential of the LHCto exclude or discover such a new physics scenario with clean signaturesconsisting of same-sign tau leptons and the simultaneous observation ofresonances in the tau plus electron or muon invariant mass. We found that inthe double production mode, effective couplings down to order $10^{-2}$TeV$^{-1}$ can be probed for flavon masses in the 10-170 GeV range at theHL-LHC at 14 TeV, but couplings down to 0.1 TeV$^{-1}$ can be excluded at 95\%confidence level with data collected by the 13 TeV LHC in the same massinterval.

Same-Sign Taus Signatures of Maximally Flavor-Violating Scalars at the LHC