Dynamical mass generation in unquenched QED using the Dyson-Schwinger equations

Kızılersü, Ayse; Sizer, Tom; Pennington, Michael R.; Williams, Anthony G.; Williams, Richard

doi:10.1103/PhysRevD.91.065015

Title: Dynamical mass generation in unquenched QED using the Dyson-Schwinger equations

Journal Article · Fri Mar 13 00:00:00 EDT 2015 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.91.065015· OSTI ID:1177478

Kızılersü, Ayse ^[1]; Sizer, Tom ^[1]; Pennington, Michael R. ^[2]; Williams, Anthony G. ^[3]; Williams, Richard ^[4]

Univ. of Adelaide, SA (Australia). Special Research Centre for the Subatomic Structure of Matter (CSSM)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Univ. of Adelaide, SA (Australia). School of Chemistry and Physics, Centre of Excellence in Particle Physics at the Tera-scale (CoEPP) and Special Research Centre for the Subatomic Structure of Matter (CSSM)
Univ. of Giessen (Germany). Inst. for Theoretical Physics

We present a comprehensive numerical study of dynamical mass generation for unquenched QED in four dimensions, in the absence of four-fermion interactions, using the Dyson-Schwinger approach. We begin with an overview of previous investigations of criticality in the quenched approximation. To this we add an analysis using a new fermion-antifermion-boson interaction ansatz, the Kizilersu-Pennington (KP) vertex, developed for an unquenched treatment. After surveying criticality in previous unquenched studies, we investigate the performance of the KP vertex in dynamical mass generation using a renormalized fully unquenched system of equations. This we compare with the results for two hybrid vertices incorporating the Curtis-Pennington vertex in the fermion equation. We conclude that the KP vertex is as yet incomplete, and its relative gauge-variance is due to its lack of massive transverse components in its design.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: Australian Research Council (Australia); Austrian Science Fund (FWF)

Grant/Contract Number:: LX 0776452; DP0558878; M1333-N16; AC05-06OR23177

OSTI ID:: 1177478

Alternate ID(s):: OSTI ID: 1181620

Report Number(s):: JLAB/THY-14-1935; DOE/OR-23177-3193; PRVDAQ; ArticleNumber: 065015

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 91, Issue 6; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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