منابع مشابه
Effective Linear Meson Model *
The effective action of the linear meson model generates the mesonic n–point functions with all quantum effects included. Based on chiral symmetry and a systematic quark mass expansion we derive relations between meson masses and decay constants. The model " predicts " values for f η and f η ′ which are compatible with observation. This involves a large momentum dependent η–η ′ mixing angle whi...
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We analyze charm meson semileptonic decays using the measured ratios ΓL/ΓT and Γ+/Γ− from D → K̄∗ and the branching ratios for D → K̄∗ and D → K̄. First we introduce the light vector mesons in a model which combines the heavy quark effective Lagrangian and the chiral perturbation approach. We propose a method which predicts the behavior of the form factors. Using the available experimental data we...
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Abstract I present some recent applications of a light cone QCD-inspired model with the mass squared operator consisting of a harmonic oscillator potential as confinement in the meson spectra. The model gives an universal and satisfactory description of both singlet and triplet states of S-wave mesons. In the present work P -wave Ds mesons are also investigated. The mass of the recently found m...
متن کاملEffective action for the chiral quark-meson model.
The scale dependence of an effective average action for mesons and quarks is described by a nonperturbative flow equation. The running couplings lead to spontaneous chiral symmetry breaking. We argue that for strong Yukawa coupling between quarks and mesons the low momentum physics is essentially determined by infrared fixed points. This allows us to establish relations between various paramete...
متن کاملThe Linear Meson Model and Chiral Perturbation Theory *
We compare the linear meson model and chiral perturbation theory in next to leading order in the quark mass expansion. In particular, we compute the couplings L 4 –L 8 of chiral perturbation theory as functions of the parameters of the linear model. They are induced by the exchange of 0 ++ scalar mesons. We use a phenomenological analysis of the effective vertices of the linear model in terms o...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 1998
ISSN: 1434-6044,1434-6052
DOI: 10.1007/s100520050115