The paper by Buchmüller and Wyler explores the implications of new interactions with a scale Λ greater than the Fermi scale G_F^1. These interactions manifest at energies below Λ through deviations from the Standard Model, described by an effective Lagrangian containing non-renormalizable SU(3)×SU(2)×U(1) invariant operators. The authors construct the first two terms of this Lagrangian and systematically study possible effects such as anomalous magnetic moments, deviations from universality in weak interactions, and rare processes. They find that flavor-conserving processes, particularly charged current weak interactions, yield the strongest bound on Λ, suggesting Λ > 5 TeV, while flavor-changing processes imply Λ > 3000 TeV. The paper also discusses conditions for natural flavor conservation and emphasizes the importance of searching for rare decays of D-mesons. The authors derive the masses of the W and Z bosons, the couplings of these bosons to fermions, and the corrections to the Fermi constant and the weak angle. They also examine the impact of new interactions on the Higgs sector, including the Higgs mass and self-interactions, and the magnetic couplings of gauge bosons to fermions.The paper by Buchmüller and Wyler explores the implications of new interactions with a scale Λ greater than the Fermi scale G_F^1. These interactions manifest at energies below Λ through deviations from the Standard Model, described by an effective Lagrangian containing non-renormalizable SU(3)×SU(2)×U(1) invariant operators. The authors construct the first two terms of this Lagrangian and systematically study possible effects such as anomalous magnetic moments, deviations from universality in weak interactions, and rare processes. They find that flavor-conserving processes, particularly charged current weak interactions, yield the strongest bound on Λ, suggesting Λ > 5 TeV, while flavor-changing processes imply Λ > 3000 TeV. The paper also discusses conditions for natural flavor conservation and emphasizes the importance of searching for rare decays of D-mesons. The authors derive the masses of the W and Z bosons, the couplings of these bosons to fermions, and the corrections to the Fermi constant and the weak angle. They also examine the impact of new interactions on the Higgs sector, including the Higgs mass and self-interactions, and the magnetic couplings of gauge bosons to fermions.