High-precision computation of two-loop Feynman diagrams with Wilson fermions
نویسندگان
چکیده
منابع مشابه
Algebraic algorithm for the computation of one-loop Feynman diagrams in lattice QCD with Wilson fermions
We describe an algebraic algorithm which allows to express every one-loop lattice integral with gluon or Wilson-fermion propagators in terms of a small number of basic constants which can be computed with arbitrary high precision. Although the presentation is restricted to four dimensions the technique can be generalized to every space dimension. Various examples are given, including the one-lo...
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We describe an algebraic algorithm which allows to express every one-loop lattice integral with gluon or Wilsonfermion propagators in terms of a small number of basic constants which can be computed with arbitrary high precision. Although the presentation is restricted to four dimensions the technique can be generalized to every space dimension. We also give a method to express the lattice free...
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In a recent paper [1] a new powerful method to calculate Feynman diagrams was proposed. It consists in setting up a Taylor series expansion in the external momenta squared. The Taylor coefficients are obtained from the original diagram by differentiation and putting the external momenta equal to zero. It was demonstrated that by a certain conformal mapping and subsequent resummation by means of...
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We have already presented at a Lattice conference [1] an algebraic algorithm that allows to apply the coordinate-space method by Lüscher and Weisz [2] to two-loop lattice integrals with gluon and Wilson-fermion propagators. In order to test the method, we have recently redone [3] a twoloop computation of the critical mass for Wilson fermions [4]. For Wilson fermions, the dressed inverse fermion...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1998
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(97)00905-5