Quark-gluon vertex and structure of mesons and diquarks
High Energy Physics - Phenomenology
2009-10-22 v2
Abstract
*REVISED VERSION* Two quark propagators with different analytic structure are employed in on and off mass-shell Bethe-Salpeter type equations for the pion and scalar diquark form-factors. One of the quark propagators has been calculated with the inclusion of a trivial quark-gluon vertex and, as a consequence, contains a complex conjugate pair of logarithmic branch points. The other quark propagator includes a non-trivial vertex ansatz and is entire, with an essential singularity at infinity. The different quark propagators lead to qualitatively different diquark form-factors.
Cite
@article{arxiv.hep-ph/9306313,
title = {Quark-gluon vertex and structure of mesons and diquarks},
author = {Samuel J. Stainsby and Reginald T. Cahill},
journal= {arXiv preprint arXiv:hep-ph/9306313},
year = {2009}
}
Comments
13 Pages, 7 figures available on E-mail request, FUPP-001-93, LATEX