dorsal/arxiv
View SchemaPrecision calculation of $\gamma d\to \pi^+ nn$ within chiral perturbation theory
| Authors | V. Lensky, V. Baru, J. Haidenbauer, C. Hanhart, A. E. Kudryavtsev, U. -G. Meißner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0505039 |
| URL | https://arxiv.org/abs/nucl-th/0505039 |
| DOI | 10.1140/epja/i2005-10154-7 |
| Journal | Eur.Phys.J.A26:107-123,2005 |
Abstract
The reaction $\gamma d\to \pi^+ nn$ is calculated up to order $\chi^{5/2}$ in chiral perturbation theory, where $\chi$ denotes the ratio of the pion to the nucleon mass. Special emphasis is put on the role of nucleon--recoil corrections that are the source of contributions with fractional power in $\chi$. Using the known near threshold production amplitude for $\gamma p\to \pi^+ n$ as the only input, the total cross section for $\gamma d\to \pi^+ nn$ is described very well. A conservative estimate suggests that the theoretical uncertainty for the transition operator amounts to 3 % for the computed amplitude near threshold.
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"abstract": "The reaction $\\gamma d\\to \\pi^+ nn$ is calculated up to order $\\chi^{5/2}$ in\nchiral perturbation theory, where $\\chi$ denotes the ratio of the pion to the\nnucleon mass. Special emphasis is put on the role of nucleon--recoil\ncorrections that are the source of contributions with fractional power in\n$\\chi$. Using the known near threshold production amplitude for $\\gamma p\\to\n\\pi^+ n$ as the only input, the total cross section for $\\gamma d\\to \\pi^+ nn$\nis described very well. A conservative estimate suggests that the theoretical\nuncertainty for the transition operator amounts to 3 % for the computed\namplitude near threshold.",
"arxiv_id": "nucl-th/0505039",
"authors": [
"V. Lensky",
"V. Baru",
"J. Haidenbauer",
"C. Hanhart",
"A. E. Kudryavtsev",
"U. -G. Mei\u00dfner"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1140/epja/i2005-10154-7",
"journal_ref": "Eur.Phys.J.A26:107-123,2005",
"title": "Precision calculation of $\\gamma d\\to \\pi^+ nn$ within chiral perturbation theory",
"url": "https://arxiv.org/abs/nucl-th/0505039"
},
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