Nonperturbative dynamics of the heavylight quark system in the nonrecoil limit
Abstract
Starting from the relativistic gaugeinvariant quarkantiquark Green function we obtain the relevant interaction in the onebody limit, which can be interpreted as the kernel of a nonperturbative Dirac equation. We study this kernel in different kinematic regions, reproducing, in particular, for heavy quark the potential case and sum rules results. We discuss the relevance of the result for heavylight mesons and the relation with the phenomenological Dirac equations used up to now in the literature.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)007491
 arXiv:
 arXiv:hepph/9703377
 Bibcode:
 1997PhLB..407..167B
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Lattice
 EPrint:
 11 pages, LaTex, elsevier.sty, 2 figures included, minor changes, one reference added, to appear in Phys. Lett. B