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

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

Ansgar Denner
(
- Wurzburg U.
)
,
Stefan Dittmaier
(
- Freiburg U.
)
,
Lars Hofer
(
- Barcelona U., ECM and
- ICC, Barcelona U.
)

Apr 22, 2016

19 pages

Published in:

Comput.Phys.Commun. 212 (2017) 220-238

Published: Mar, 2017

e-Print:

1604.06792 [hep-ph]

DOI:

10.1016/j.cpc.2016.10.013

Report number:

FR-PHENO-2016-003,
ICCUB-16-016

View in:

ADS Abstract Service

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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

References(83)

Figures(0)

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