2008/08/31 by Christian S. Fischer, Richard Williams · 1 citation
Physics and Astronomy · #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.78.074006
published as Phys.Rev.D78:074006,2008 · 9 pages, 5 figures. Minor typos corrected. Version to appear in PRD
arxiv created 2008/09/30 · arxiv updated 2009/12/01
We investigate hadronic unquenching effects in light quarks and mesons. To this end we take into account the back-coupling of the pion onto the quark propagator within the non-perturbative continuum framework of Schwinger-Dyson equations (SDE) and Bethe-Salpeter equations (BSE). We improve on a previous approach by explicitly solving both the coupled system of DSEs and BSEs in the complex plane and the normalisation problem for Bethe-Salpeter kernels depending on the total momentum of the meson. As a result of our study we find considerable unquenching effects in the spectrum of light pseudoscalar, vector and axial-vector mesons.