COLLIER -- A fortran-library for one-loop integrals

  title={COLLIER -- A fortran-library for one-loop integrals},
  author={A. Denner and S. Dittmaier and L. Hofer},
  journal={arXiv: High Energy Physics - Phenomenology},
We introduce the fortran-library COLLIER for the numerical evaluation of one-loop scalar and tensor integrals in perturbative relativistic quantum field theories. Important features are the implementation of dedicated methods to achieve numerical stability for 3- and 4-point tensor integrals, the support of complex masses for internal particles, and the possibility to choose between dimensional and mass regularization for infrared singularities. COLLIER supports one-loop N-point functions up to… Expand

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