Strange Quark Mass from Pseudoscalar Sum Rule with O(alphas4) Accuracy
Abstract
We include the new, five-loop, O(alphas4) correction into the QCD sum rule used for the s-quark mass determination. The pseudoscalar Borel sum rule is taken as a study case. The OPE for the correlation function with N4LO, O(alphas4) accuracy in the perturbative part, and with dimension <= 6 operators reveals a good convergence. We observe a significant improvement of stability of the sum rule with respect to the variation of the renormalization scale after including the O(alphas4) correction. We obtain the interval ms(2 GeV)=105 6 7 MeV, which exhibits about 2 MeV increase of the central value, if the O(alphas4) terms are removed.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.