Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-11-16
Mod.Phys.Lett. A14 (1999) 1509-1518
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, LaTeX, 2 figures (eps), Text reorganised and new reference
Scientific paper
10.1142/S0217732399001607
We propose an implicit regularisation scheme. The main advantage is that since no explicit use of a regulator is made, one can in principle avoid undesirable symmetry violations related to its choice. The divergent amplitudes are split into basic divergent integrals which depend only on the loop momenta and finite integrals. The former can be absorbed by a renormalisation procedure whereas the latter can be evaluated without restrictions. We illustrate with the calculation of the $QED$ and $\phi^4_4$-theory $\beta$-function to one and two-loop order, respectively.
Battistel O. A.
Brizola A.
Nemes Carolina M.
Sampaio Marcos
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