Implications of the muon anomalous magnetic moment and Higgs-mediated flavor changing neutral currents

In the light of the recent measurement of the muon anmalous magnetic moment aμ by the Muon (g − 2) Collaboration, we examine the contribution to aμ from the exchange of flavor changing scalars. Assuming that the heavier generations have larger flavor changing couplings, we obtain a bound on μ−τ Yukawa coupling for a given scalar mass. Constraints on other flavor changing/conserving couplings are also obtained from the lepton flavor violating decays of muon and tau lepton, and bounds on the branching ratio of τ → 3e, μ → 3e and τ → eμe processes are predicted. Typeset using REVTEX