dorsal/arxiv
View SchemaNuclear forces from chiral Lagrangians using the method of unitary transformation II: The two-nucleon system
| Authors | E. Epelbaum, W. Glöckle, Ulf-G. Meißner |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9910064 |
| URL | https://arxiv.org/abs/nucl-th/9910064 |
| DOI | 10.1016/S0375-9474(99)00821-0 |
| Journal | Nucl.Phys.A671:295-331,2000 |
Abstract
We employ the chiral nucleon-nucleon potential derived in ref.[1] to study bound and scattering states in the two-nucleon system. At next-to-leading order, this potential is the sum of renormalized one-pion and two-pion exchange and contact interactions. At next-to-next-to-leading order, we have additional chiral two-pion exchange with low-energy constants determined from pion-nucleon scattering. Alternatively, we consider the \Delta(1232) as an explicit degree of freedom in the effective field theory. The nine parameters related to the contact interactions can be determined by a fit to the np S- and P-waves and the mixing parameter \epsilon_1 for laboratory energies below 100 MeV. The predicted phase shifts and mixing parameters for higher energies and higher angular momenta are mostly well described for energies below 300 MeV. The S-waves are described as precisely as in modern phenomenological potentials. We find a good description of the deuteron properties.
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"abstract": "We employ the chiral nucleon-nucleon potential derived in ref.[1] to study\nbound and scattering states in the two-nucleon system. At next-to-leading\norder, this potential is the sum of renormalized one-pion and two-pion exchange\nand contact interactions. At next-to-next-to-leading order, we have additional\nchiral two-pion exchange with low-energy constants determined from pion-nucleon\nscattering. Alternatively, we consider the \\Delta(1232) as an explicit degree\nof freedom in the effective field theory. The nine parameters related to the\ncontact interactions can be determined by a fit to the np S- and P-waves and\nthe mixing parameter \\epsilon_1 for laboratory energies below 100 MeV. The\npredicted phase shifts and mixing parameters for higher energies and higher\nangular momenta are mostly well described for energies below 300 MeV. The\nS-waves are described as precisely as in modern phenomenological potentials. We\nfind a good description of the deuteron properties.",
"arxiv_id": "nucl-th/9910064",
"authors": [
"E. Epelbaum",
"W. Gl\u00f6ckle",
"Ulf-G. Mei\u00dfner"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/S0375-9474(99)00821-0",
"journal_ref": "Nucl.Phys.A671:295-331,2000",
"title": "Nuclear forces from chiral Lagrangians using the method of unitary transformation II: The two-nucleon system",
"url": "https://arxiv.org/abs/nucl-th/9910064"
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