Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] aejo_v1_0.tar.gz(72 Kbytes)|
|Manuscript Title: OneLOop: for the evaluation of one-loop scalar functions|
|Authors: A. van Hameren|
|Program title: OneLOop|
|Catalogue identifier: AEJO_v1_0|
Distribution format: tar.gz
|Journal reference: Comput. Phys. Commun. 182(2011)2427|
|Programming language: Fortran.|
|Operating system: Linux, Unix.|
|Keywords: NLO computations, one-loop scalar functions.|
|Classification: 4.4, 11.1.|
Nature of problem:
In order to reach next-to-leading order precision in the calculation of cross sections of hard scattering processes, one-loop amplitudes have to be evaluated. This is done by expressing them as linear combination of one-loop scalar functions. In a concrete calculation, these functions eventually have to be evaluated. If the scattering process involves unstable particles, consistency requires the evaluation of these functions with complex internal masses.
Expressions for the one-loop scalar functions in terms of single-variable analytic functions existing in literature have been implemented.
The applicability is restricted to the kinematics occuring in collider-physics.
The evaluation of the most general 4-point function with 4 complex masses takes about 180μs, and the evaluation of the 4-point function with 4 real masses takes about 18μs on a 2.80GHz Intel Xeon processor.
|Disclaimer | ScienceDirect | CPC Journal | CPC | QUB|