Abstract
We revisit earlier calculations of leptonic decay constants of vector charmonia and present and illustrate our decomposition of the corresponding covariant Bethe-Salpeter amplitudes in terms of orbital angular momentum as interpreted in the meson’s rest frame. Our results confirm our previous conclusions drawn from the magnitudes of vector-meson leptonic decay constants, identifying the Ψ(3770) and Ψ(4160) as D-wave states in our setup.
Highlights
This notion, often referring to the relevant scales in different descriptions of hadrons, is sometimes unjustly used to imply truth or importance
It rapidly becomes clear to any practitioner of theoretical hadron spectroscopy that dynamical chiral symmetry breaking (DχSB), an apparent phenomenon in quantum chromodynamics (QCD), is a necessary ingredient in a successful description of the light-hadron spectrum
DSBSE Model Setup In the DSBSE approach, chiral symmetry as well as its dynamical breaking are described by the axial-vector Ward-Takahashi identity (AVWTI) [42]
Summary
This notion, often referring to the relevant scales in different descriptions of hadrons, is sometimes unjustly used to imply truth or importance. It rapidly becomes clear to any practitioner of theoretical hadron spectroscopy that dynamical chiral symmetry breaking (DχSB), an apparent phenomenon in QCD, is a necessary ingredient in a successful description of the light-hadron spectrum. The chiral symmetry of QCD with massless quarks, together with its dynamical breaking results in a massless Goldstone boson.
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