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The analytic result for the radiative correction of order$\alpha^{2}(Z\alpha)^{5}m$ to the Lamb shift connected with a polarizationinsertion in one of the two external Coulomb lines is obtained. This correctionarises from a gauge invariant set of diagrams which contain, besides thepolarization insertion in the Coulomb leg, all one-loop radiative photoninsertions in the electron line with two external Coulomb lines.Comment: 7 pages, 1 table, 1 figure, RevTeX, typos in intermediate eq.(9)  correcte

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Analytic contribution of order<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">α</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>(Zα<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>5</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>m to the Lamb shift

Analytic contribution of orderα2(Zα)5m to the Lamb shift