Artículos de revistas
Flavor SU(4) breaking between effective couplings
Fecha
2012-02-07Registro en:
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 3, 2012.
1550-7998
1550-2368
10.1103/PhysRevD.85.031502
2-s2.0-84857759514
Autor
Universidade Cruzeiro Do sul
Universidade Estadual Paulista (UNESP)
Argonne National Laboratory
Forschungszentrum Jülich
Illinois Institute of Technology
Institución
Resumen
Using a framework in which all elements are constrained by Dyson-Schwinger equation studies in QCD, and therefore incorporate a consistent, direct and simultaneous description of light- and heavy-quarks and the states they constitute, we analyze the accuracy of SU(4)-flavor symmetry relations between πρπ, KρK, and DρD couplings. Such relations are widely used in phenomenological analyses of the interactions between matter and charmed mesons. We find that while SU(3)-flavor symmetry is accurate to 20%, SU(4) relations underestimate the DρD coupling by a factor of 5. © 2012 American Physical Society.