Instanton effects in three flavor QCD

Michael Dine, Patrick Draper, Guido Festuccia

Research output: Contribution to journalArticlepeer-review

Abstract

Recently it was shown that in QCD-like theories with Nf>N, where Nf is the number of light flavors and N is the number of colors, there are correlation functions that vanish in perturbation theory and at short distances receive dominant, calculable contributions from small instantons. Here we extend the set of such objects to theories with Nf=N, which includes real QCD, and discuss their application as a calibration of lattice computations at small quark mass. We revisit the related issue of the u quark mass and its additive renormalization by small instantons, and discuss an alternative test of mu=0 on the lattice.

Original languageEnglish (US)
Article number054004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number5
DOIs
StatePublished - Sep 3 2015
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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