dorsal/arxiv
View SchemaNew Result for the Pion-Nucleon Sigma Term from an Updated VPI/GW Pion-Nucleon Partial-Wave and Dispersion Relation Analysis
| Authors | M. M. Pavan, R. A. Arndt, I. I Strakovsky, R. L. Workman |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9912034 |
| URL | https://arxiv.org/abs/nucl-th/9912034 |
| Journal | PiN Newslett.15:118-122,1999 |
Abstract
A new result for the nucleon sigma term from an updated pion-nucleon partial-wave and dispersion relation analysis of the Virginia Polytechnic Institute (now George Washington University) group is discussed. Using a method similar to that of Gasser, Leutwyler, Locher, and Sainio, we obtain Sigma=90 +/- 8 MeV (preliminary), in disagreement with the canonical result 64 +/- 8 MeV, but consistent with expectations based on new information on the $\pi$NN coupling constant, pionic atoms, and the Delta resonance width.
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"abstract": "A new result for the nucleon sigma term from an updated pion-nucleon\npartial-wave and dispersion relation analysis of the Virginia Polytechnic\nInstitute (now George Washington University) group is discussed. Using a method\nsimilar to that of Gasser, Leutwyler, Locher, and Sainio, we obtain Sigma=90\n+/- 8 MeV (preliminary), in disagreement with the canonical result 64 +/- 8\nMeV, but consistent with expectations based on new information on the $\\pi$NN\ncoupling constant, pionic atoms, and the Delta resonance width.",
"arxiv_id": "nucl-th/9912034",
"authors": [
"M. M. Pavan",
"R. A. Arndt",
"I. I Strakovsky",
"R. L. Workman"
],
"categories": [
"nucl-th"
],
"journal_ref": "PiN Newslett.15:118-122,1999",
"title": "New Result for the Pion-Nucleon Sigma Term from an Updated VPI/GW Pion-Nucleon Partial-Wave and Dispersion Relation Analysis",
"url": "https://arxiv.org/abs/nucl-th/9912034"
},
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