Hypergeometric representation of a four-loop vacuum bubble
Ervin Bejdakic, York Schroder
Abstract
In this article, we present a new analytic result for a certain single-mass-scale four-loop vacuum (bubble) integral. We also discuss its systematic -expansion in d=4-2 as well as d=3-2 dimensions, the coefficients of which are expressible in terms of harmonic sums at infinity.
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