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We determine the 1=N2 f and 1=N3 f contributions to the QED beta function stemming from the closed set of nested diagrams. At the order of 1=N2 f, we discover… Click to show full abstract
We determine the 1=N2 f and 1=N3 f contributions to the QED beta function stemming from the closed set of nested diagrams. At the order of 1=N2 f, we discover a new logarithmic branch cut closer to the origin when compared to the 1=Nf results. The same singularity location appears at 1=N3 f, and these correspond to a UV renormalon singularity in the finite part of the photon two-point function.
Keywords:
function;
beta function;
function renormalons;
qed beta;
renormalons nf2;
towards qed
Journal Title: Physical Review D
Year Published: 2020
Link to full text (if available)
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Journal Title: Physical Review D
Year Published: 2020
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!