dorsal/arxiv
View SchemaThe pd <--> pi+ t reaction around the Delta resonance
| Authors | Luciano Canton, Wolfgang Schadow |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9706009 |
| URL | https://arxiv.org/abs/nucl-th/9706009 |
| DOI | 10.1103/PhysRevC.56.1231 |
| Journal | Phys.Rev.C56:1231-1245,1997 |
Abstract
The pd <--> pi+ t process has been calculated in the energy region around the Delta-resonance with elementary production/absorption mechanisms involving one and two nucleons. The isobar degrees of freedom have been explicitly included in the two-nucleon mechanism via pi-- and rho-exchange diagrams. No free parameters have been employed in the analysis since all the parameters have been fixed in previous studies on the simpler pp <--> pi+ d process. The treatment of the few-nucleon dynamics entailed a Faddeev-based calculation of the reaction, with continuum calculations for the initial p-d state and accurate solutions of the three-nucleon bound-state equation. The integral cross-section was found to be quite sensitive to the NN interaction employed while the angular dependence showed less sensitivity. Approximately a 4% effect was found for the one-body mechanism, for the three-nucleon dynamics in the p-d channel, and for the inclusion of a large, possibly converged, number of three-body partial states, indicating that these different aspects are of comparable importance in the calculation of the spin-averaged observables.
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"abstract": "The pd \u003c--\u003e pi+ t process has been calculated in the energy region around the\nDelta-resonance with elementary production/absorption mechanisms involving one\nand two nucleons. The isobar degrees of freedom have been explicitly included\nin the two-nucleon mechanism via pi-- and rho-exchange diagrams. No free\nparameters have been employed in the analysis since all the parameters have\nbeen fixed in previous studies on the simpler pp \u003c--\u003e pi+ d process. The\ntreatment of the few-nucleon dynamics entailed a Faddeev-based calculation of\nthe reaction, with continuum calculations for the initial p-d state and\naccurate solutions of the three-nucleon bound-state equation. The integral\ncross-section was found to be quite sensitive to the NN interaction employed\nwhile the angular dependence showed less sensitivity. Approximately a 4% effect\nwas found for the one-body mechanism, for the three-nucleon dynamics in the p-d\nchannel, and for the inclusion of a large, possibly converged, number of\nthree-body partial states, indicating that these different aspects are of\ncomparable importance in the calculation of the spin-averaged observables.",
"arxiv_id": "nucl-th/9706009",
"authors": [
"Luciano Canton",
"Wolfgang Schadow"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.56.1231",
"journal_ref": "Phys.Rev.C56:1231-1245,1997",
"title": "The pd \u003c--\u003e pi+ t reaction around the Delta resonance",
"url": "https://arxiv.org/abs/nucl-th/9706009"
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