dorsal/arxiv
View SchemaThe reactions $pp\to pp\pi^0$ and $pp\to d\pi^+$ at threshold: The role of the isoscalar $\pi N$ scattering amplitude
| Authors | C. Hanhart, J. Haidenbauer, M. Hoffmann, Ulf-G. Meißner, J. Speth |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9707029 |
| URL | https://arxiv.org/abs/nucl-th/9707029 |
| DOI | 10.1016/S0370-2693(98)00216-0 |
| Journal | Phys.Lett. B424 (1998) 8-14 |
Abstract
We examine the role of the elementary isoscalar pion--nucleon scattering amplitude in the description of the processes $pp \to pp\pi^0$ and $pp\to d\pi^+$ at threshold. We argue that the presently used tree level dimension two approximation used in chiral perturbation theory is insufficient as input by direct comparison with the $\pi$N scattering data. We also show that a successful semi--phenomenological boson--exchange model does better in the description of these data. The influence of the violation of crossing symmetry in the meson--exchange model has to be studied in more detail. We stress that further investigations of the process $pp\to d\pi^+$ can pave the way to a deeper understanding of the pion dominated part of the transition operator.
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"abstract": "We examine the role of the elementary isoscalar pion--nucleon scattering\namplitude in the description of the processes $pp \\to pp\\pi^0$ and $pp\\to\nd\\pi^+$ at threshold. We argue that the presently used tree level dimension two\napproximation used in chiral perturbation theory is insufficient as input by\ndirect comparison with the $\\pi$N scattering data. We also show that a\nsuccessful semi--phenomenological boson--exchange model does better in the\ndescription of these data. The influence of the violation of crossing symmetry\nin the meson--exchange model has to be studied in more detail. We stress that\nfurther investigations of the process $pp\\to d\\pi^+$ can pave the way to a\ndeeper understanding of the pion dominated part of the transition operator.",
"arxiv_id": "nucl-th/9707029",
"authors": [
"C. Hanhart",
"J. Haidenbauer",
"M. Hoffmann",
"Ulf-G. Mei\u00dfner",
"J. Speth"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0370-2693(98)00216-0",
"journal_ref": "Phys.Lett. B424 (1998) 8-14",
"title": "The reactions $pp\\to pp\\pi^0$ and $pp\\to d\\pi^+$ at threshold: The role of the isoscalar $\\pi N$ scattering amplitude",
"url": "https://arxiv.org/abs/nucl-th/9707029"
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