dorsal/arxiv
View SchemaThe NN final-state interaction in the helicity structure of $\vec d(\vec\gamma,\pi^-)pp$ reaction
| Authors | Eed M. Darwish |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0412040 |
| URL | https://arxiv.org/abs/nucl-th/0412040 |
| DOI | 10.1016/j.nuclphysa.2004.12.039 |
| Journal | Nucl.Phys. A748 (2005) 596-607 |
Abstract
The influence of final-state $NN$-rescattering on the helicity structure of the $\vec\gamma\vec d\to\pi^-pp$ reaction in the energy range from $\pi$-threshold up to 550 MeV has been investigated. The differential polarized cross-section difference for the parallel and antiparallel helicity states is predicted and compared with recent experimental data. It is shown that the effect of $NN$-rescattering is much less important in the polarized differential cross-section difference than in the previously studied unpolarized differential cross section. Furthermore, the contribution of $\vec\gamma\vec d\to\pi^-pp$ to the spin asymmetry of the deuteron is explicitly evaluated over the region of the $\Delta$(1232)-resonance with inclusion of $NN$-rescattering. The effect of $NN$ final-state interaction is found to be much larger in the asymmetry than in the total cross section and leads to an appreciable reduction of the spin asymmetry in the $\Delta$-region.
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"abstract": "The influence of final-state $NN$-rescattering on the helicity structure of\nthe $\\vec\\gamma\\vec d\\to\\pi^-pp$ reaction in the energy range from\n$\\pi$-threshold up to 550 MeV has been investigated. The differential polarized\ncross-section difference for the parallel and antiparallel helicity states is\npredicted and compared with recent experimental data. It is shown that the\neffect of $NN$-rescattering is much less important in the polarized\ndifferential cross-section difference than in the previously studied\nunpolarized differential cross section. Furthermore, the contribution of\n$\\vec\\gamma\\vec d\\to\\pi^-pp$ to the spin asymmetry of the deuteron is\nexplicitly evaluated over the region of the $\\Delta$(1232)-resonance with\ninclusion of $NN$-rescattering. The effect of $NN$ final-state interaction is\nfound to be much larger in the asymmetry than in the total cross section and\nleads to an appreciable reduction of the spin asymmetry in the $\\Delta$-region.",
"arxiv_id": "nucl-th/0412040",
"authors": [
"Eed M. Darwish"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.nuclphysa.2004.12.039",
"journal_ref": "Nucl.Phys. A748 (2005) 596-607",
"title": "The NN final-state interaction in the helicity structure of $\\vec d(\\vec\\gamma,\\pi^-)pp$ reaction",
"url": "https://arxiv.org/abs/nucl-th/0412040"
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