Meson properties in an extended nonlocal NJL model

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Plant, R. S. ORCID: https://orcid.org/0000-0001-8808-0022 and Birse, M. C. (1998) Meson properties in an extended nonlocal NJL model. Nuclear Physics A, 628 (4). pp. 607-644. ISSN 0375-9474 doi: 10.1016/S0375-9474(97)00635-0

Abstract/Summary

We consider a non-local version of the NJL model, based on a separable quark-quark interaction. The interaction is extended to include terms that bind vector and axial-vector mesons. The non-locality means that no further regulator is required. Moreover the model is able to confine the quarks by generating a quark propagator without poles at real energies. Working in the ladder approximation, we calculate amplitudes in Euclidean space and discuss features of their continuation to Minkowski energies. Conserved currents are constructed and we demonstrate their consistency with various Ward identities. Various meson masses are calculated, along with their strong and electromagnetic decay amplitudes. We also calculate the electromagnetic form factor of the pion, as well as form factors associated with the processes γγ* → π0 and ω → π0γ*. The results are found to lead to a satisfactory phenomenology and lend some dynamical support to the idea of vector-meson dominance.

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Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/16586
Identification Number/DOI	10.1016/S0375-9474(97)00635-0
Refereed	Yes
Divisions	Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology No Reading authors. Back catalogue items
Uncontrolled Keywords	Nambu-Jona-Lasinio model; Nonlocal interactions; Chiral symmetry; Mesons; Form factors; Vector-meson dominance
Publisher	Elsevier
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Date Deposited:	25 Aug 2011 13:26	Date item deposited into CentAUR
Last Modified:	13 Jul 2025 05:11	Date item last modified

References

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