Effects of vacuum polarization and of proton polarizability in the lamb shift of muonic hydrogen

The contributions to the Lamb shift in muonic hydrogen from hadronic vacuum polarization and from the correction associated with electron vacuum polarization and with the proton polarizability are calculated by using present-day experimental data on the cross section for e(+)e(-) annihilation into hadrons and oil structure functions for deep-inelastic ep scattering. The numerical value of the total contribution to the (2P-2S) shift in muonic hydrogen is found to be 10.95 mu eV. (C) 2001 MAIK Nauka/Interperiodica.