NUMERICAL APPROACH TO TWO-LOOP THREE POINT FUNCTIONS WITH MASSES

Junpei Fujimoto, Yoshimitsu Shimizu, Kiyoshi Kato and Toshiaki Kaneko
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Junpei Fujimoto: National Laboratory for High-Energy Physics (KEK), Oho 1–1, Tsukuba, Ibaraki 305, Japan
Yoshimitsu Shimizu: National Laboratory for High-Energy Physics (KEK), Oho 1–1, Tsukuba, Ibaraki 305, Japan
Kiyoshi Kato: Kogakuin University, Nishi-Shinjuku, 1–24, Shinjuku, Tokyo 160, Japan
Toshiaki Kaneko: Meiji-Gakuin University, Kamikurata 1518, Totsuka, Yokohama 244, Japan

International Journal of Modern Physics C (IJMPC), 1995, vol. 06, issue 04, 525-530

Abstract: Extending the method successful for one-loop integrals, the computation of two-loop diagrams with general internal masses is discussed. For the two-loop vertex of nonplanar type, as an example, we show a calculation related to$Z^0 \to t\bar t$vertex.

Date: 1995
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DOI: 10.1142/S0129183195000381

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