Reduction schemes for one-loop tensor integrals

  title={Reduction schemes for one-loop tensor integrals},
  author={A. Denner and S. Dittmaier},
  journal={Nuclear Physics},
Abstract We present new methods for the evaluation of one-loop tensor integrals which have been used in the calculation of the complete electroweak one-loop corrections to e + e − → 4 fermions. The described methods for 3-point and 4-point integrals are, in particular, applicable in the case where the conventional Passarino–Veltman reduction breaks down owing to the appearance of Gram determinants in the denominator. One method consists of different variants for expanding tensor coefficients… Expand
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