dorsal/arxiv
View SchemaMultipole Analyses for p(gamma,pi) and p(gamma,gamma) in the region of the P33 delta Resonance
| Authors | A. M. Sandorfi, S. Hoblit, J. Tonnison |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9810019 |
| URL | https://arxiv.org/abs/nucl-th/9810019 |
| Journal | Few Body Syst.Suppl.11:144-156,1999 |
Abstract
Multipole analyses of the p(g,pi0), p(g,pi+) and p(g,g) reactions are carried out using different data sets. With sufficient constraints from polarization observables, the ratio of E2/M1 transition amplitudes for N->delta (EMR) appears to be largely insensitive to differences between recent p(g,pi0) cross section measurements. We deduce a current best estimate of EMR = -(2.85 +/-0.34 +/-0.21)%. Back angle Compton cross sections require a value for the backward spin polarizability that is significantly lower than previous expectations, with a magnitude that is coupled to the (g,pi) cross sections.
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"abstract": "Multipole analyses of the p(g,pi0), p(g,pi+) and p(g,g) reactions are carried\nout using different data sets. With sufficient constraints from polarization\nobservables, the ratio of E2/M1 transition amplitudes for N-\u003edelta (EMR)\nappears to be largely insensitive to differences between recent p(g,pi0) cross\nsection measurements. We deduce a current best estimate of EMR = -(2.85 +/-0.34\n+/-0.21)%. Back angle Compton cross sections require a value for the backward\nspin polarizability that is significantly lower than previous expectations,\nwith a magnitude that is coupled to the (g,pi) cross sections.",
"arxiv_id": "nucl-th/9810019",
"authors": [
"A. M. Sandorfi",
"S. Hoblit",
"J. Tonnison"
],
"categories": [
"nucl-th"
],
"journal_ref": "Few Body Syst.Suppl.11:144-156,1999",
"title": "Multipole Analyses for p(gamma,pi) and p(gamma,gamma) in the region of the P33 delta Resonance",
"url": "https://arxiv.org/abs/nucl-th/9810019"
},
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