dorsal/arxiv
View Schemapi N --> eta N and eta N --> eta N partial wave T-matrices in a coupled, three channel model
| Authors | Mijo Batinic, Ivo Slaus, Alfred Svarc, B. M. K. Nefkens |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9501011 |
| URL | https://arxiv.org/abs/nucl-th/9501011 |
| DOI | 10.1103/PhysRevC.51.2310 10.1103/PhysRevC.57.1004 |
| Journal | Phys.Rev.C51:2310-2325,1995; Erratum-ibid.C57:1004-1005,1998 |
Abstract
The pi N --> eta N and eta N --> eta N partial wave T-matrices for the eight lowest partial waves have been obtained in a three coupled channel model with unitarity manifestly imposed. The two physical channels are pi_N and eta_N, and the third channel, pi_pi_N is an effective, but unphysical two body channel which represents all remaining processes. The pi_N elastic phase shifts and the weighted data base of the pi- p --> eta n total and differential cross sections are chosen as the input for the fitting procedure. A model containing a single resonance in each of the three partial waves that dominates the eta production at lower energies is compared with previous analyses, based on similar assumptions. A multiresonance coupled channel model is introduced which significantly improves the agreement with all input data. Our results are compared with a complementary multiresonance coupled channel analysis that is constrained with elastic and continuum production channels. The inclusion of the fourth P11 resonance in the 1440 - 2200 MeV region further improves the agreement between the analysis and the data.
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"abstract": "The pi N --\u003e eta N and eta N --\u003e eta N partial wave T-matrices for the eight\nlowest partial waves have been obtained in a three coupled channel model with\nunitarity manifestly imposed. The two physical channels are pi_N and eta_N, and\nthe third channel, pi_pi_N is an effective, but unphysical two body channel\nwhich represents all remaining processes. The pi_N elastic phase shifts and the\nweighted data base of the pi- p --\u003e eta n total and differential cross sections\nare chosen as the input for the fitting procedure. A model containing a single\nresonance in each of the three partial waves that dominates the eta production\nat lower energies is compared with previous analyses, based on similar\nassumptions. A multiresonance coupled channel model is introduced which\nsignificantly improves the agreement with all input data. Our results are\ncompared with a complementary multiresonance coupled channel analysis that is\nconstrained with elastic and continuum production channels. The inclusion of\nthe fourth P11 resonance in the 1440 - 2200 MeV region further improves the\nagreement between the analysis and the data.",
"arxiv_id": "nucl-th/9501011",
"authors": [
"Mijo Batinic",
"Ivo Slaus",
"Alfred Svarc",
"B. M. K. Nefkens"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.51.2310 10.1103/PhysRevC.57.1004",
"journal_ref": "Phys.Rev.C51:2310-2325,1995; Erratum-ibid.C57:1004-1005,1998",
"title": "pi N --\u003e eta N and eta N --\u003e eta N partial wave T-matrices in a coupled, three channel model",
"url": "https://arxiv.org/abs/nucl-th/9501011"
},
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