Chiral corrections to vector meson decay constants

Chiral Corrections to Vector Meson Decay Constants

We calculate the leading quark mass corrections of order mq log(mq), mq and m 3/2 q to the vector meson decay constants within Heavy Vector Meson Chiral Perturbation Theory. We discuss the issue of electromagnetic gauge invariance and the heavy mass expansion. Reasonably good fits to the observed decay constants are obtained.

Meson Supermultiplet Decay Constants

We use a covariant supermultiplet theory to determine the primary coupling constant associated with several types of two-body meson decay. Despite the diverse range of decays considered the primary coupling constant is surprisingly uniform. We envisage the extension of the techniques to heavy quark cases, including as preliminary examples the calculation of the D * + and D * 0 total decay width...

Bethe–Salpeter Study of Vector Meson Masses and Decay Constants

The masses and decay constants of the light vector mesons ρ/ω, φ and K? are studied within a ladder-rainbow truncation of the coupled Dyson–Schwinger and Bethe–Salpeter equations of QCD with a model 2-point gluon function. The approach is consistent with quark and gluon confinement, reproduces the correct one-loop renormalization group behavior of QCD, generates dynamical chiral symmetry breaki...

Electromagnetic corrections to pseudoscalar decay constants

Symmetry-breaking corrections to meson decay constants in the heavy-quark effective theory.

Spinand flavor-symmetry breaking corrections to decay constants of heavy mesons are analyzed in next-to-leading order in the l/m~ expansion. The general structure of these corrections is derived in an effective-field-theory approach. The subleading universal form factors, which parametrize the matrix elements of higher-dimensional operators in the effective theory, are estimated using QCD sum r...