DSEs and pseudoscalar mesons: an aperc,u

Simple item page
dc.creatorHoell, A.
dc.creatorKrassnigg, A.
dc.creatorRoberts, C. D.
dc.date2003-11-10
dc.date.accessioned2026-07-07T05:39:59Z
dc.date.available2026-07-07T05:39:59Z
dc.descriptionAn hallmark of present-day Dyson-Schwinger equation applications in hadron physics is the existence of a systematic and symmetry preserving truncation scheme. This enables the proof of exact results; e.g., the leptonic decay constant of every pseudoscalar meson except the pion vanishes in the chiral limit. Calculations using the scheme's leading-order truncation are reliable in the vector and flavour nonsinglet pseudoscalar channels. In this rainbow-ladder truncation, an impulse approximation provides the consistent current for all six-point quark Schwinger functions. That is well illustrated via the anomalous process pi0 -> gamma gamma. Using two-, three- and four-point Schwinger functions calculated in rainbow-ladder truncation, the textbook value of the width is obtained algebraically and independent of model details if, and only if, the impulse approximation is used to describe the associated matrix element.
dc.description8 pages, 1 figure; Contribution to the proceedings of "LC03: Light Cone Workshop - Hadrons and Beyond," 5-9/August/2003, Grey College, University of Durham
dc.identifierhttps://arxiv.org/abs/nucl-th/0311033
dc.identifierhttp://arxiv.org/abs/nucl-th/0311033
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/82124
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.subjectAccelerator Physics
dc.titleDSEs and pseudoscalar mesons: an aperc,u
dc.typetext

Files

Collections

arXiv