dorsal/arxiv
View SchemaA next-to-next-to-leading-order $pp \to pp\pi^0$ transition operator in chiral perturbation theory
| Authors | V. Dmitrašinović, K. Kubodera, F. Myhrer, T. Sato |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9902048 |
| URL | https://arxiv.org/abs/nucl-th/9902048 |
| DOI | 10.1016/S0370-2693(99)01075-8 |
| Journal | Phys.Lett.B465:43-54,1999 |
Abstract
We present a systematic analysis of next-to-next-to-leading-order diagrams that contribute to the $pp \to pp\pi^0$ production at threshold. Analytic expressions are given for the effective transition operators, and the relative importance of various types of diagrams is discussed. The vertex-correction-type graphs are found to give only small corrections to lower order graphs in conformity with expectations. By contrast, we find very large contributions from the two-pion graphs which can be interpreted as a part of effective $\sigma$-meson exchange diagrams. The recoil correction to the pion rescattering diagram also turns out to be large.
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"abstract": "We present a systematic analysis of next-to-next-to-leading-order diagrams\nthat contribute to the $pp \\to pp\\pi^0$ production at threshold. Analytic\nexpressions are given for the effective transition operators, and the relative\nimportance of various types of diagrams is discussed. The\nvertex-correction-type graphs are found to give only small corrections to lower\norder graphs in conformity with expectations. By contrast, we find very large\ncontributions from the two-pion graphs which can be interpreted as a part of\neffective $\\sigma$-meson exchange diagrams. The recoil correction to the pion\nrescattering diagram also turns out to be large.",
"arxiv_id": "nucl-th/9902048",
"authors": [
"V. Dmitra\u0161inovi\u0107",
"K. Kubodera",
"F. Myhrer",
"T. Sato"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0370-2693(99)01075-8",
"journal_ref": "Phys.Lett.B465:43-54,1999",
"title": "A next-to-next-to-leading-order $pp \\to pp\\pi^0$ transition operator in chiral perturbation theory",
"url": "https://arxiv.org/abs/nucl-th/9902048"
},
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