Connected, disconnected and strange quark contributions to HVP

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Abstract

We calculate all neutral vector two-point functions in Chiral Perturbation Theory (ChPT) to two-loop order and use these to estimate the ratio of disconnected to connected contributions as well as contributions involving the strange quark. We extend the ratio of −1/10 derived earlier in two flavour ChPT at one-loop order to a large part of the higher order contributions and discuss corrections to it. Our final estimate of the ratio disconnected to connected is negative and a few % in magnitude.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics

Keywords

  • Chiral Lagrangians, Lattice QCD, Precision QED
Original languageEnglish
Article number86
JournalJournal of High Energy Physics
Volume2016
Issue number11
StatePublished - 2016 Nov 1
Publication categoryResearch
Peer-reviewedYes