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The proton polarizability correction to the Lamb shift of electronic andmuonic hydrogen is calculated on the basis of isobar model and experimentaldata on the structure functions of deep inelastic lepton-nucleon scattering.The contributions of the Born terms, vector-meson exchanges and nucleonresonances are taken into account in the construction of the photoabsorptioncross sections for transversely and longitudinally polarized virtual photonssigma_{T,L}.Comment: 11 pages, 3 figure

Proton-polarizability effect in the Lamb shift for the hydrogen atom