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[Licence| Download | New Version Template] adno_v1_0.tar.gz(11 Kbytes)
Manuscript Title: Nonperturbative evaluation of the few-body states for scalar chi- square phi interaction.
Authors: C. Savkli
Program title: phi3
Catalogue identifier: ADNO_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 135(2001)312
Programming language: Fortran.
Computer: Sun 19.
Operating system: Unix.
Keywords: Nonperturbative, Bound states, Feynman-Schwinger representation, Monte-Carlo, Numerical evaluation, Elementary particle physics, QCD.
Classification: 11.5.

Nature of problem:
The program provided here evaluates the mass and distribution probabilities of the fully interacting n-body propagator (n<=3) for scalar chi-square phi interaction in 3+1 dimensions. The evaluation takes into account all self energy, vertex dressing, and exchange interaction contributions except those involving matter loops (the quenched approximation).

Solution method:
The Feynman-Schwinger representation approach is used to express the field theoretical Green's function in terms of a quantum mechanical path integral. The resultant expression is evaluated using a Monte-Carlo simulation.

Only n = 1, 2, and 3 body propagators are considered. The extension to n >= 4 requires straightforward modifications in the program.

Running time:
About 1 day for the 1-body propagator with the self energy.