Pion-cloud effects in the BSE description of mesons
  We investigate the effect of including hadronic resonance contributions in the description of 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), in essence describing the so-called \emph{pion-cloud}. As a result of our study we find that an unquenching of this form provides for considerable effects in the spectrum of light mesons. 
Richard Williams and Christian S. Fischer