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Title: Instantons, chiral dynamics, and hadronic resonances

Abstract

We use the interacting instanton liquid model (IILM) as a tool to study the role played by the chiral interactions in the lowest-lying vector and axial-vector meson resonances. We find that narrow a{sub 1} and {rho} meson resonances can be generated by instanton-induced chiral forces, even in the absence of confinement. In the IILM, these hadrons are found to have masses only about 30% larger than the experimental value and small width < or approx. 10-50 MeV. This result suggests that chiral interactions are very important in these systems and provide most of their mass. We explore the decaying patterns of the {rho} meson, in the absence of confinement. We argue that, in our model where only chiral forces are switched on, this meson decays dissociating into its quark-antiquark constituents.

Authors:
; ;  [1]
  1. Dipartimento di Fisica and INFN, Universita degli Studi di Trento, Via Sommarive 15, Povo, Trento 38050 (Italy) and European Centre for Theoretical Studies in Nuclear Physics and Related Areas, Strada delle Tabarelle 286, Villazzano, Trento, I-38050 (Italy)
Publication Date:
OSTI Identifier:
21020071
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.054024; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AXIAL VECTOR MESONS; CHIRALITY; INSTANTONS; PARTICLE DECAY; PARTICLE MODELS; PARTICLE WIDTHS; RESONANCE PARTICLES; REST MASS

Citation Formats

Cristoforetti, M., Faccioli, P., and Traini, M. Instantons, chiral dynamics, and hadronic resonances. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.054024.
Cristoforetti, M., Faccioli, P., & Traini, M. Instantons, chiral dynamics, and hadronic resonances. United States. doi:10.1103/PHYSREVD.75.054024.
Cristoforetti, M., Faccioli, P., and Traini, M. Thu . "Instantons, chiral dynamics, and hadronic resonances". United States. doi:10.1103/PHYSREVD.75.054024.
@article{osti_21020071,
title = {Instantons, chiral dynamics, and hadronic resonances},
author = {Cristoforetti, M. and Faccioli, P. and Traini, M.},
abstractNote = {We use the interacting instanton liquid model (IILM) as a tool to study the role played by the chiral interactions in the lowest-lying vector and axial-vector meson resonances. We find that narrow a{sub 1} and {rho} meson resonances can be generated by instanton-induced chiral forces, even in the absence of confinement. In the IILM, these hadrons are found to have masses only about 30% larger than the experimental value and small width < or approx. 10-50 MeV. This result suggests that chiral interactions are very important in these systems and provide most of their mass. We explore the decaying patterns of the {rho} meson, in the absence of confinement. We argue that, in our model where only chiral forces are switched on, this meson decays dissociating into its quark-antiquark constituents.},
doi = {10.1103/PHYSREVD.75.054024},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}