PROGRAM SUMMARY
Title of program:
phi3
Catalogue identifier:
ADNO
Ref. in CPC:
135(2001)312
Distribution format: tar gzip file
Operating system: Unix
Number of lines in distributed program, including test data, etc:
1554
Keywords:
Nonperturbative, Bound states, Feynman-Schwinger representation,
Monte-Carlo, Numerical evaluation, Elementary particle physics, QCD.
Programming language used: Fortran
Computer:
Sun 19 .
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).
Method of solution:
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.
Restrictions:
Only n = 1, 2, and 3 body propagators are considered. The extension to
n >= 4 requires straightforward modifications in the program.
Typical running time:
About 1 day for the 1-body propagator with the self energy.