Fermionic NNLO contributions to Bhabha scattering

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, $m_e^2<

Keywords:

• Kernel (statistics)
• Bhabha scattering
• Hadron
• Dispersion relation
• Fermion
• Electron
• Particle physics
• Perturbation theory (quantum mechanics)
• Physics

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