Nature of the light scalar mesons

6533b856fe1ef96bd12b27ac

RESEARCH PRODUCT

Nature of the light scalar mesons

B. Silvestre-brac A. Valcarce Javier Vijande Francisco Fernández

subject

Nuclear and High Energy Physics Particle physics Meson Nuclear Theory [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]Isoscalar High Energy Physics::Lattice meson mass quark confinement Lattice field theory Nuclear Theory FOS: Physical sciences sparticles 01 natural sciences High Energy Physics - Experiment Nuclear Theory (nucl-th)High Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical sciences quantum chromodynamics [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physics Nuclear Experiment Quantum chromodynamics Physics 010308 nuclear & particles physics Glueball High Energy Physics::Phenomenology Scalar (physics)lattice field theory 12.39.-x 12.38.-t Física Lattice QCD Diquark High Energy Physics - Phenomenology [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experiment chiral symmetries

description

Despite the apparent simplicity of meson spectroscopy, light scalar mesons cannot be accommodated in the usual $q\bar q$ structure. We study the description of the scalar mesons below 2 GeV in terms of the mixing of a chiral nonet of tetraquarks with conventional $q\bar q$ states. A strong diquark-antidiquark component is found for several states. The consideration of a glueball as dictated by quenched lattice QCD drives a coherent picture of the isoscalar mesons.

year	journal	country	edition	language
2005-08-11

10.1103/physrevd.72.034025 http://hal.in2p3.fr/in2p3-00024517

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