期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 159, 期 3, 页码 145-156出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cpc.2004.01.004
关键词
loop integrals; extrapolation; multivariate integration; vertex diagram; box diagram
We present a class of methods for the evaluation of loop integrals based on extrapolation. The method is based on generating a sequence of approximations which converge to the loop integral value as a parameter E introduced in the integrand tends to zero. We examine the applicability of linear and non-linear extrapolation processes. Test results are given for one-loop three-point vertex and four-point functions and for a two-loop vertex diagram. (C) 2004 Elsevier B.V. All rights reserved.
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