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Manuscript Title: SOSpin, a C++ library for Yukawa decomposition in SO(2N) models
Authors: Nuno Cardoso, David Emmanuel-Costa, Nuno Gonçalves, C. Simões
Program title: SOSpin
Catalogue identifier: AEZM_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 203(2016)178
Programming language: C++.
Computer: PC, Apple.
Operating system: UNIX (Linux, Mac OS X 11).
RAM: > 20 MB depending on the number of processes required
Keywords: Special orthogonal groups, Grand Unified Theory.
PACS: 02.20.Qs, 02.70.Wz, 12.10.-g, 12.10.Dm.
Classification: 4.2, 11.1, 11.6.

External routines: In order to make further simplifications on the expressions obtained the library calls the Symbolic Manipulation System FORM program [1].

Nature of problem:
The decomposition of an Yukawa interaction invariant under SO(2N) in terms of SU (N) fields.

Solution method:
We make use of the oscillator expansion formalism, where the SO (2N) spinor representations are expressed in terms of creation and annihilation operators of a Grassmann algebra acting on a vacuum state.

Running time:
It depends on the input expressions, it can take a few seconds or more for very large representations (because of memory exhaustion).

[1] J. Kuipers, T. Ueda, J. A. M. Vermaseren and J. Vollinga, "FORM version 4.0", Comput. Phys. Commun. 184 (2013) 1453.
[2] http://sospin.hepforge.org