Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-09-11
Nucl.Phys.B796:184-210,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
36 pages
Scientific paper
10.1016/j.nuclphysb.2007.12.013
We have developed an efficient algorithm for the subtraction of infrared divergences that arise in the evaluation of QED corrections to the anomalous magnetic moment of lepton (g-2). By incorporating this new algorithm, we have extended the automated code-generating system developed previously to deal with diagrams without internal lepton loops (called q-type), which produced convergent integrals when applied to diagrams that have only ultraviolet-divergent subdiagrams of vertex type. The new system produces finite integrals for all q-type diagrams, including those that contain self-energy subdiagrams and thus exhibit infrared-divergent behavior. We have thus far verified the system for the sixth- and eighth-order cases. We are now evaluating 6354 vertex diagrams of q-type that contribute to the tenth-order lepton g-2.
Aoyama Takahiro
Hayakawa Masahiko
Kinoshita Takahiro
Nio Makiko
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