New Results for a Two-Loop Massless Propagator-Type Feynman Diagram
نویسندگان
چکیده
منابع مشابه
Massless Two-loop Self-energy Diagram
ai−d πd ∫ dk1 d k2 [(k1 − k)2]a1 [(k2 − k)2]a2 [(k1 − k2)]3(k 2) a4(k2 1) a5 (1.1) in d-dimensional Euclidean momentum space. It has a long and interesting history. For many years, most of the information we had about perturbative quantum field theory was coming (directly or indirectly) from this integral. All massless three-loop self-energy integrals (with integer indices) reduce to 6 master i...
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An asymptotic expansion of the two-loop two-point “master” diagram with two masses m and M , on the mass shell Q = M, is presented. The treatment of the non-analytical terms arising in the expansion around the branching point is discussed. Some details of the calculation of a new class of two-loop integrals are given. E-mail: [email protected] E-mail: [email protected]
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ژورنال
عنوان ژورنال: Theoretical and Mathematical Physics
سال: 2018
ISSN: 0040-5779,1573-9333
DOI: 10.1134/s0040577918020083