Towards light scalar meson structure

The origin of the lightest scalar mesons is studied in the framework of the instanton liquid model of the QCD vacuum. The impact of phonon-like vacuum excitations on the σ -meson features is qualitatively analyzed. In particular, it is noticed that the changes produced in the scalar sector may unexp...

Full description

Saved in:
Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2009-05, Vol.61 (1), p.61-68
Main Authors: Molodtsov, S. V., Siemiarczuk, T., Sissakian, A. N., Sorin, A. S., Zinovjev, G. M.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Elementary Particles
Excitation
Hadrons
Heavy Ions
Instantons
Liquids
Measurement Science and Instrumentation
Mesons
Nuclear Energy
Nuclear Physics
Origins
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Theoretical Physics
Scalars
Sigma-mesons
String Theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The origin of the lightest scalar mesons is studied in the framework of the instanton liquid model of the QCD vacuum. The impact of phonon-like vacuum excitations on the σ -meson features is qualitatively analyzed. In particular, it is noticed that the changes produced in the scalar sector may unexpectedly become quite considerable in spite of insignificant values of corrections to the dynamical quark masses and then the medley of σ -meson and those excitations may reveal itself as broad resonance states of different masses.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-009-0993-3