Two-Loop Heavy-Flavor Contribution to Bhabha Scattering
arXiv:0710.4775 · doi:10.1103/PhysRevLett.100.131601
Abstract
We evaluate the two-loop QED corrections to the Bhabha scattering cross section which involve the vacuum polarization by heavy fermions of arbitrary mass m_f >> m_e. The results are valid for generic values of the Mandelstam invariants s,t,u >> m_e^2.
13 pages, 6 figures. Equations in the appendix generalized to the heavy-quark case