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Title: Fermionic NNLO contributions to Bhabha scattering
Authors: Actis, S.
Czakon, Michał
Gluza, Janusz
Riemann, T.
Keywords: teoria perturbacji; metody matematyczne w fizyce
Issue Date: 2007
Citation: Acta Physica Polonica B, Vol. 38, no. 11 (2007), s. 3517-3527
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 me, combined with arbitrary values of the fermion mass mf in the loop, m2 e ≪ s, t,m2 f , or with hadronic insertions. We present numerical results for mf = mμ,m ,mtop at typical small- and large-angle kinematics ranging from 1 GeV to 500 GeV.
ISSN: 0587-4254
Appears in Collections:Artykuły (WNŚiT)

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