0000000001317559
AUTHOR
L. Brücher
oneloop 2.0 — A program package calculating one-loop integrals
We present an improved version of our program package oneloop which -- written as a package for MAPLE -- solves one-loop Feynman integrals. The package is calculating one-, two- and three-point functions both algebraically and numerically to any tensor rank. In addition to the original version oneloop 2.0 also calculates infrared divergent integrals. Higher powers of propagator terms and the $O(\eps)$ parts relevant for two-loop calculations are now supported.
SELF-ENERGIES AND VERTEX CORRECTIONS WITH TWO FACTORIZING LOOPS
A complete set of factorizing two-loop self-energies and vertex corrections is calculated analytically for arbitrary masses and momenta — including the case of collinear singularities — within the ℛ-functions approach.
A new method for computing one-loop integrals
We present a new program package for calculating one-loop Feynman integrals, based on a new method avoiding Feynman parametrization and the contraction due to Passarino and Veltman. The package is calculating one-, two- and three-point functions both algebraically and numerically to all tensor cases. This program is written as a package for Maple. An additional Mathematica version is planned later.
xloops - Automated Feynman diagram calculation
The program package xloops, a general, model independent tool for the calculation of high energy processes up to the two-loop level, is introduced. xloops calculates massive one- and two-loop Feynman diagrams in the standard model and related theories both analytically and numerically. A user-friendly Xwindows frontend is part of the package. xloops relies on the application of parallel space techniques. The treatment of tensor structure and the separation of divergences in analytic expressions is described in this scheme. All analytic calculations are performed with Maple. We describe the mathematical methods and computer algebra techniques xloops uses and give a brief introduction how to …
A new method for computing one-loop integrals
Abstract We present a new program package for calculating one-loop Feynman integrals, based on a new method avoiding Feynman parametrization and the contraction due to Passarino and Veltman. The package is calculating one-, two- and three-point functions both algebraically and numerically to all tensor cases. This program is written as a package for Maple. An additional Mathematica version is planned later. Title of program: ONELOOP.MA Catalogue Id: ACVW_v1_0 Nature of problem The theoretical determination of cross sections in particle processes requires the calculation of radiative corrections. The most important contribution comes from the level of one-loop Feynman diagrams which arise fr…
oneloop 2.0 — A program package calculating one-loop integrals
Abstract We present an improved version of our program package oneloop which — written as a package for MAPLE (Char, Geddes, Gonnet, Leong, Monagan, Watt, MAPLE V Language and Library Reference Manuals) — solves one-loop Feynman integrals. The package is calculating one-, two- and three-point functions both algebraically and numerically to any tensor rank. In addition to the original version, oneloop 2.0 also calculates infrared divergent integrals. Higher powers of propagator terms and the O(ε) parts... Title of program: oneloop.ma, version 2.0 Catalogue Id: ACVW_v2_0 [ADGT] Nature of problem The theoretical determination of cross sections in particle processes requires the calculation of …