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Nonlocal chiral quark models with wavefunction renormalization: Sigma properties and pi-pi scattering parameters.

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Nonlocal chiral quark models with wavefunction renormalization: Sigma properties and pi-pi scattering parameters.

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dc.contributor.author Noguera Puchol, Santiago
dc.contributor.author Scoccola, N.N.
dc.date.accessioned 2014-03-21T08:28:39Z
dc.date.available 2014-03-21T08:28:39Z
dc.date.issued 2008
dc.identifier.citation Noguera Puchol, Santiago Scoccola, N.N. 2008 Nonlocal chiral quark models with wavefunction renormalization: Sigma properties and pi-pi scattering parameters. Physical Review D 78 114002-1 114002-13
dc.identifier.uri http://hdl.handle.net/10550/33634
dc.description.abstract We analyze the sigma meson mass and width together with the pion-pion scattering parameters in the context of nonlocal chiral quark models with wave function renormalization (WFR). We consider both nonlocal interactions based on the frequently used exponential form factor, and on fits to the quark mass and renormalization functions obtained in lattice calculations. In the case of the sigma properties, we obtain results which are less dependent on the parametrization than in the standard local Nambu-Jona-Lasinio model, and which are in reasonable agreement with the recently reported empirical values. We also show that the inclusion of the WFR tend to improve the description of the pi-pi scattering parameters, with the lattice inspired parametrization providing the best overall results. Finally, we analyze the connection of the nonlocal quark models discussed here with chiral perturbation theory, and present the model predictions for the low-energy constants relevant for pi-pi scattering to O(4) in the chiral expansion.
dc.relation.ispartof Physical Review D, 2008, vol. 78, p. 114002-1-114002-13
dc.subject Partícules (Física nuclear)
dc.subject Física nuclear
dc.title Nonlocal chiral quark models with wavefunction renormalization: Sigma properties and pi-pi scattering parameters.
dc.type journal article es_ES
dc.date.updated 2014-03-21T08:28:39Z
dc.identifier.doi 10.1103/PhysRevD.78.114002
dc.identifier.idgrec 048090
dc.rights.accessRights open access es_ES
dc.identifier.url 10.1103/PhysRevD.78.114002

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