• Open Access

Screened massive expansion of the quark propagator in the Landau gauge

Giorgio Comitini, Daniele Rizzo, Massimiliano Battello, and Fabio Siringo
Phys. Rev. D 104, 074020 – Published 19 October 2021

Abstract

The infrared behavior of the quark propagator is studied at one loop and in the Landau gauge (ξ=0) using the screened massive expansion of full QCD and three different resummation schemes for the quark self-energy. The shift of the expansion point of perturbation theory, which defines the screened expansion, together with a nonstandard renormalization of the bare parameters, proves sufficient to describe the dynamical generation of an infrared quark mass also in the chiral limit. Analytically, the scale for such a mass is set by a mass parameter M, whose value is fixed by a fit to the lattice data for quenched QCD. The quark mass function M(p2) is shown to be in very good agreement with the lattice results. The quark Z function, on the other hand, shows the wrong qualitative behavior in all but one of the studied resummation schemes, where its behavior is qualitatively correct, but only at sufficiently high energies.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
13 More
  • Received 1 August 2021
  • Accepted 30 September 2021

DOI:https://doi.org/10.1103/PhysRevD.104.074020

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

Authors & Affiliations

Giorgio Comitini1,2,*, Daniele Rizzo1,†, Massimiliano Battello1,‡, and Fabio Siringo1,2,§

  • 1Dipartimento di Fisica e Astronomia “E. Majorana”, Università di Catania, Via S. Sofia 64, I-95123 Catania, Italy
  • 2INFN Sezione di Catania, Via S. Sofia 64, I-95123 Catania, Italy

  • *giorgio.comitini@dfa.unict.it
  • daniele.rizzo@studium.unict.it
  • massimiliano.battello@gmail.com
  • §fabio.siringo@ct.infn.it

Article Text

Click to Expand

References

Click to Expand
Issue

Vol. 104, Iss. 7 — 1 October 2021

Reuse & Permissions
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

×

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×