Light scalar mesons in photon–photon collisions
نویسندگان
چکیده
منابع مشابه
Light Scalar Mesons
We review how a certain effective chiral Lagrangian approach to ππ scattering, πK scattering and η → ηππ decay provides evidence for the existence of light scalars σ(550) and κ(900) as well as describing the f0(980) and the a0(980). An attempt to fit these into a nonet suggests that their structure is closer to a dual quark–dual antiquark than to a quark–antiquark. A possible mechanism to expla...
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 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 کاملLight Scalar Mesons in Charm Meson Decays
We present recent results on scalar light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Low mass scalar mesons are found to have large contributions to the decays studied, D → Kππ and D,D s → πππ. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.
متن کامل4 Propagators of light scalar mesons
For the first time, as far as we know, in field theory are found explicit forms of propagators satisfying the Källen – Lehmann representation. To be exact, it is shown that scalar meson propagators, taking into account a virtual intermediate state contribution to the resonance self-energy, satisfy the Källen – Lehmann representation in the wide domain of coupling constants of the light scalar m...
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ژورنال
عنوان ژورنال: Physics-Uspekhi
سال: 2011
ISSN: 1063-7869,1468-4780
DOI: 10.3367/ufne.0181.201108b.0827