We present the public C++ library NiNjA, which implements the Integrand Reduction via Laurent Expansion method for the computation of one-loop integrals. The algorithm is suited for applications to complex one-loop processes.
Program title: Ninja
Catalogue identifier: AETO_v1_0
Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AETO_v1_0.html
Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland
Licensing provisions: GNU General Public License, version 3
No. of lines in distributed program, including test data, etc.: 74303
No. of bytes in distributed program, including test data, etc.: 530944
Distribution format: tar.gz
Programming language: C++.
Computer: Any computer with a compliant C++ compiler.
Operating system: Unix-like (tested on Linux and Mac OS).
RAM: Several thousands of bytes (it can vary depending on the complexity of the computation)
Classification: 4.4, 11.1.
External routines: A library of one-loop Master Integrals:
OneLOop, LoopTools, or any other library implementing a suitable interface
Nature of problem:
Computation of one-loop integrals contributing to scattering amplitudes.
Semi-numerical implementation of the integrand reduction via Laurent expansion, using a simplified polynomial division algorithm.
Depending on the number of integrals and their complexity, between less than a millisecond up to several seconds per phase-space point, for the computation of a full amplitude. (C) 2014 Elsevier B.V. All rights reserved.
- One-loop computations
- Integrand reduction
- NLO QCD CORRECTIONS
- SCALAR INTEGRALS