Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations

Apr 22, 2016
19 pages
Published in:
  • Comput.Phys.Commun. 212 (2017) 220-238
  • Published: Mar, 2017
e-Print:
Report number:
  • FR-PHENO-2016-003,
  • ICCUB-16-016

Citations per year

20162018202020222024020406080100120
Abstract: (Elsevier)
We present the library Collier  for the numerical evaluation of one-loop scalar and tensor integrals in perturbative relativistic quantum field theories. The code provides numerical results for arbitrary tensor and scalar integrals for scattering processes in general quantum field theories. For tensor integrals either the coefficients in a covariant decomposition or the tensor components themselves are provided. Collier  supports complex masses, which are needed in calculations involving unstable particles. Ultraviolet and infrared singularities are treated in dimensional regularization. For soft and collinear singularities mass regularization is available as an alternative.
Note:
  • 51 pages, version to appear in Comput.Phys.Commun
  • NLO computations
  • Radiative corrections
  • One-loop integrals
  • Higher orders
  • Tensor reduction
  • Scalar integrals
  • numerical calculations
  • numerical methods
  • loop integral
  • field theory: perturbation theory