Scalar Mesons: Fifty Years of Challenging the Quark Model
نویسندگان
چکیده
منابع مشابه
Scalar Mesons in a Relativistic Quark Model with Instanton - Induced
In a relativistic quark model with linear confinement and an instanton-induced interaction which solves the η-η ′ puzzle, scalar mesons are found as almost pure SU(3) flavor states. This suggests a new interpretation of the scalar nonet: We propose that the recently discovered f 0 (1500) is not a glue-ball but the scalar (mainly)–octet meson for which the K ¯ K decay mode is suppressed. The mai...
متن کاملScalar Mesons in a Chiral Quark Model with Glueball
Ground-state scalar isoscalar mesons and a scalar glueball are described in a U(3)×U(3) chiral quark model of the Nambu–Jona-Lasinio (NJL) type with ’t Hooft interaction. The latter interaction produces singlet-octet mixing in the scalar and pseudoscalar sectors. The glueball is introduced into the effective meson Lagrangian as a dilaton on the base of scale invariance. The mixing of the glueba...
متن کاملHölder Inequalities and Isospin Splitting of the Quark Scalar Mesons
A Hölder inequality analysis of the QCD Laplace sum-rule which probes the non-strange (nn̄) components of the I = {0, 1} (light-quark) scalar mesons supports the methodological consistency of an effective continuum contribution from instanton effects. This revised formulation enhances the magnitude of the instanton contributions which split the degeneracy between the I = 0 and I = 1 channels. De...
متن کاملConstituent Quark-based Linear Σ Model (lσm) Quark and Scalar Mesons, Vector Meson Dominance
After describing the SU(2) linear sigma model (LσM), we dynamically generate it using the B.W. Lee null tadpole sum (characterizing the true vacuum) together with the dimensional regularization lemma. Next we generate the chiral-limiting (CL) nonstrange and strange constituent quark masses m̂ = 325.7 MeV; ms = 486 MeV away from the CL. Finally, we study vector meson dominance (VMD) and the pion,...
متن کاملChiral Quark Model of Mesons
We study SU(3)L×SU(3)R chiral quark model of mesons up to next leading order of 1/Nc expansion. Composite vector and axial-vector mesons resonances are introduced via non-linear realization of chiral SU(3) and vector meson dominant. Effects of one-loop graphs of pseudoscalar, vector and axial-vector mesons is calculated systematically and the significant results are obtained. Correction of effe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Physica Polonica B Proceedings Supplement
سال: 2018
ISSN: 1899-2358,2082-7865
DOI: 10.5506/aphyspolbsupp.11.455