Tensor reduction of twoloop vacuum diagrams and projectors for expanding threepoint functions
Abstract
Explicit general formulae for the tensor reduction of twoloop massive vacuum diagrams are presented. The problem of calculating the corresponding coefficients is shown to be equivalent to the problem of constructing differential operators (projectors) extracting the coefficients of the momentum expansion of massive scalar threepoint functions (with any number of loops), so the solution to the latter problem is also given.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1996
 DOI:
 10.1016/05503213(96)000338
 arXiv:
 arXiv:hepph/9511261
 Bibcode:
 1996NuPhB.465..507D
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 13 pages, plain latex, no figures