Roman N. Lee

activity

20232026

collaborators

3 papers

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…

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

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