Fermionic NNLO contributions to Bhabha scattering
Abstract
We derive the two-loop corrections to Bhabha scattering from heavy fermions using dispersion relations. The double-box contributions are expressed by three kernel functions. Convoluting the perturbative kernels with fermionic threshold functions or with hadronic data allows to determine numerical results for small electron mass m_e, combined with arbitrary values of the fermion mass m_f in the loop, , or with hadronic insertions. We present numerical results for m_f = m_{\mu}, m_{\tau}, m_{top} at typical small- and large-angle kinematics ranging from 1 GeV to 500 GeV.
Keywords
Cite
@article{arxiv.0710.5111,
title = {Fermionic NNLO contributions to Bhabha scattering},
author = {S. Actis and M. Czakon and J. Gluza and T. Riemann},
journal= {arXiv preprint arXiv:0710.5111},
year = {2008}
}
Comments
To be published in Acta Physica Polonica, based on the talk given at 31st International Conference of Theoretical Physics: Matter to the Deepest: Recent Development in Physics of Fundamental Interactions, Ustron, Katowice, Poland, 5-11 Sep 2007