1996/07/15 by K. L. Mitchell, P. C. Tandy · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.55.1477
published as Phys.Rev.C55:1477-1491,1997 · 30 pages, 10 figures, RevTeX document with PostScript figures, uuencoded
arxiv created 1996/07/15 · openalex publication_date 1997/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the self-energy amplitudes for the \ensuremathρ-\ensuremathω meson system produced by an effective field theory model at the quark level characterized by a finite range quark-quark interaction and an isospin breaking bare quark mass difference mu\ensuremath-md. Dynamical effects associated with confinement and dressing of quarks and the finite size of the produced \mathrmq\ifmmode\else\textasciimacron\fiq meson modes are treated. Parameters of this approach, previously constrained by soft pion physics, are here supplemented in a minimal way to reproduce m_\ensuremathω and g_\ensuremathρ\ensuremathπ\ensuremathπ. Calculations are carried out up to the one-pion-loop level and the predictions for \ensuremathρ0-\ensuremathω mixing, mass splitting, the \ensuremathρ width and the symmetry breaking \ensuremathω\ensuremathπ\ensuremathπ coupling constant and form factor are presented. The contribution of the direct \ensuremathω\ensuremath→\ensuremathπ\ensuremathπ process relative to the \ensuremathω\ensuremath→\ensuremathρ\ensuremath→\ensuremathπ\ensuremathπ process is discussed within this model.