This title appears in the Scientific Report :
2000
Nuclear forces from chiral Lagrangians using the method of unitary transformation (II) : the two-nucleon system
Nuclear forces from chiral Lagrangians using the method of unitary transformation (II) : the two-nucleon system
We employ the chiral nucleon-nucleon potential derived in [Nucl. Phys. A 637 (1998) 107] 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-lea...
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Personal Name(s): | Epelbaum, E. |
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Glöckle, W. / Meissner, U.G. | |
Contributing Institute: |
Institut für Kernphysik; IKP |
Published in: |
Nuclear physics |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2000
|
Physical Description: |
295 |
Document Type: |
Journal Article |
Research Program: |
Theoretische Kernphysik |
Series Title: |
Nuclear Physics A
671 |
Subject (ZB): | |
Publikationsportal JuSER |
We employ the chiral nucleon-nucleon potential derived in [Nucl. Phys. A 637 (1998) 107] 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. (C) 2000 Elsevier Science B.V. All rights reserved. |