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Manuscript Title: SHELL2: package for the calculation of two-loop on-shell Feynman diagrams in FORM.
Authors: J. Fleischer, O.V. Tarasov
Program title: SHELL2
Catalogue identifier: ACHZ_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 71(1992)193
Programming language: Form.
Peripherals: disc.
Keywords: General purpose, Diagramatic expansions, Quantum field theory, Qed, Qcd, High energy physics, Perturbation theory, Dimensional Regularization, Multiloop feynman Integral.
Classification: 4.4.

Nature of problem:
Dimensionally regularized multiloop massive Feynman integrals of the propagator type appearing in quantum field theory and in particular in high energy calculations are computed analytically.

Solution method:
We apply the method of integration by parts. The integration is reduced to simple algebraic transformations of the integrand.

Only scalar integrals are permitted as "input". The program so far allows only the calculation of up to two-loop integrals but should be extensible for higher orders. Moreover the program allows at present only for one massive on-shell particle or one independent on-shell momentum.

Running time:
The typical running time strongly depends on the topology and complexity of the calculated diagram.