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Titolo:
S-11-N(1535) and -N(1650) resonances in meson-baryon unitarized coupled channel chiral perturbation theory - art. no. 116008
Autore:
Nieves, J; Arriola, ER;
Indirizzi:
Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain Univ Granada Granada Spain E-18071 t Fis Moderna, E-18071 Granada, Spain
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 11, volume: 6411, anno: 2001,
pagine: 6008 -
SICI:
0556-2821(200112)6411:11<6008:SA-RIM>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
PION-NUCLEON SCATTERING; BETHE-SALPETER APPROACH; LOW-ENERGY; N SCATTERING; 2 LOOPS; DYNAMICS; MODEL; PI-N->PI-PI-N; AMPLITUDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Nieves, J Univ Granada, Dept Fis Moderna, E-18071 Granada, Spain Univ Granada Granada Spain E-18071 rna, E-18071 Granada, Spain
Citazione:
J. Nieves e E.R. Arriola, "S-11-N(1535) and -N(1650) resonances in meson-baryon unitarized coupled channel chiral perturbation theory - art. no. 116008", PHYS REV D, 6411(11), 2001, pp. 6008

Abstract

The s-wave meson-baryon scattering is analyzed for the strangeness S = 0 sector in a Bethe-Salpeter coupled channel formalism incorporating chiral symmetry. Four channels have been considered: piN, etaN, K Lambda, K Sigma. The needed two-particle irreducible matrix amplitude is taken from lowest order chiral perturbation theory in a relativistic formalism and low energy constants are fitted to the elastic piN phase shifts and the pi (-) p-->etanand pi (-) p-->K-0 Lambda cross section data. The position of the complex poles in the second Riemann sheet of the scattering amplitude determines masses and widths of the S-11-N(1535) and -N(1650) resonances, in reasonable agreement with experiment. A good overall description of data, from piN threshold up to 2 GeV, is achieved, keeping in mind that the two-pion production channel has not been included.

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Documento generato il 03/04/20 alle ore 02:04:53