P. A. Krachkov

activity

20152026

most citedSmall-angle scattering and quasiclassical approximation beyond leading order

6 citations · 10 across the 7 of their papers we have counts for

collaborators

Showing hep-phShow all

5 papers · 1 filter

hep-ph2026

Radiative correction to the charge asymmetry in $e^{+} e^{-} \to μ^{+} μ^{-}$ process

Roman E. Gerasimov, Petr A. Krachkov, Roman N. Lee

We calculate the next-to-next-to-leading order (NNLO) QED corrections to the $C$ -odd part of the differential cross section of the $e^{+} e^{-} \to μ^{+} μ^{-}$ process. This part contributes…

hep-ph2025

Electron-positron annihilation into heavy leptons at two loops

Roman E. Gerasimov, Petr A. Krachkov, Roman N. Lee

We calculate the NNLO QED corrections to the $C$ -even part of differential cross section of $e^{+} e^{-} \to μ^{+} μ^{-}$ process. We neglect power corrections in the electron mass and obtai…

hep-ph2023

$O (m α^{2} (Z α)^{6})$ contribution to Lamb shift from radiative corrections to the Wichmann-Kroll potential

Petr A. Krachkov, Roman N. Lee

We derive an analytical expression for the contribution of the order $m α^{2} (Z α)^{6}$ to the hydrogen Lamb shift which comes from the diagrams for radiative corrections to the Wichman…

hep-ph2023★ 3 cited

Two-loop corrections to Lamb shift and hyperfine splitting in hydrogen via multi-loop methods

Petr A. Krachkov, Roman N. Lee

We revisit the contributions of order $α^{2} (Z α)^{5} m$ and $α^{2} (Z α) E_{F}$ , respectively, to the Lamb shift and to the hyperfine splitting from mixed self-energy-vacuum-polarization diagr…

hep-ph2022★ 1 cited

Charge asymmetry in the spectra of bremsstrahlung and pair production

Petr A. Krachkov, Roman N. Lee

We calculate the first Coulomb correction to the spectra of two processes: the electron bremsstrahlung and electron-positron photoproduction in the Coulomb field. We show that, in…

Radiative correction to the charge asymmetry in e+e−→μ+μ− process

Electron-positron annihilation into heavy leptons at two loops

O(mα2(Zα)6) contribution to Lamb shift from radiative corrections to the Wichmann-Kroll potential

Two-loop corrections to Lamb shift and hyperfine splitting in hydrogen via multi-loop methods

Charge asymmetry in the spectra of bremsstrahlung and pair production

Radiative correction to the charge asymmetry in $e^{+} e^{-} \to μ^{+} μ^{-}$ process

$O (m α^{2} (Z α)^{6})$ contribution to Lamb shift from radiative corrections to the Wichmann-Kroll potential