Analysis the f 0 ( 980 ) and a 0 ( 980 ) mesons as four - quark states with the QCD sum rules
نویسندگان
چکیده
In this article, we take the point of view that the scalar mesons f0(980) and a0(980) are diquark-antidiquark states (qq)3̄(q̄q̄)3, and devote to determine their masses in the framework of the QCD sum rules approach with the interpolating currents constructed from scalar-scalar type and pseudoscalarpseudoscalar type diquark pairs respectively. The numerical results indicate that the scalar mesons f0(980) and a0(980) may have two possible diquarkantidiquark substructures. PACS numbers: 12.38.Lg; 13.25.Jx; 14.40.Cs
منابع مشابه
5 Analysis the f 0 ( 980 ) and a 0 ( 980 ) mesons as four - quark states with the QCD sum rules
In this article, we take the point of view that the scalar mesons f0(980) and a0(980) are diquark-antidiquark states (qq)3̄(q̄q̄)3, and devote to determine their masses in the framework of the QCD sum rules approach with the interpolating currents constructed from scalar-scalar type and pseudoscalarpseudoscalar type diquark pairs respectively. The numerical results indicate that the scalar mesons ...
متن کاملar X iv : h ep - p h / 99 05 30 3 v 1 1 1 M ay 1 99 9 QCD Sum - Rule Invisibilty of the σ
QCD Laplace sum-rules for light-quark I = 0, 1 scalar currents are used to investigate candidates for the lightest q ¯ q scalar mesons. The theoretical predictions for the sum-rules include instanton contributions which split the degeneracy between the I = 0 and I = 1 channels. The self-consistency of the theoretical predictions is verified through a Hölder inequality analysis, confirming the e...
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 کامل4 Light Scalar Mesons ∗
The crucial points of physics of light scalar mesons are discussed. The special attention is given to the chiral shielding of lightest scalar mesons and the production of the well established light scalar mesons in the φ radiative decays. Arguments in favor of the four-quark model of the a 0 (980) and f 0 (980) mesons are given. To discuss actually the nature of the putative nonet of the light ...
متن کامل1 Light Scalar Mesons ∗
The crucial points of physics of light scalar mesons are discussed. The special attention is given to the chiral shielding of lightest scalar mesons and the production of the well established light scalar mesons in the φ radiative decays. Arguments in favor of the four-quark model of the a 0 (980) and f 0 (980) mesons are given. To discuss actually the nature of the putative nonet of the light ...
متن کامل