This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2003-10129-8 in citations.
Please use the identifier: http://hdl.handle.net/2128/10693 in citations.
Improving the convergence of the chiral expansion for nuclear forces II: Low phases and the deuteron
Improving the convergence of the chiral expansion for nuclear forces II: Low phases and the deuteron
Recently, we have proposed a new cut-off scheme for pion loop integrals in the two-pion exchange potential. This method allows for a consistent implementation of constraints from pion-nucleon scattering and has been successfully applied to peripheral nucleon-nucleon partial waves. We now consider lo...
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Personal Name(s): | Epelbaum, E. |
---|---|
Glöckle, W. / Meissner, U.G. | |
Contributing Institute: |
Institut 3 (Theoretische Kernphysik); IKP-TH |
Published in: | The @European physical journal / A, 19 (2004) S. 401 - 412 |
Imprint: |
Berlin
Springer
2004
|
Physical Description: |
401 - 412 |
DOI: |
10.1140/epja/i2003-10129-8 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen |
Series Title: |
European Physical Journal A
19 |
Subject (ZB): | |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10693 in citations.
Recently, we have proposed a new cut-off scheme for pion loop integrals in the two-pion exchange potential. This method allows for a consistent implementation of constraints from pion-nucleon scattering and has been successfully applied to peripheral nucleon-nucleon partial waves. We now consider low partial waves in the non-perturbative regime, where the regularized Lippmann-Schwinger equation has to be solved in order to generate the bound and scattering states. We observe an improved description of most of the phase shifts when going from next-to- to next-to-next-to-leading order in the chiral expansion. We also find a good description of the deuteron properties. In addition, the new cut-off scheme allows to avoid the presence of unphysical deeply bound states. We discuss the cut-off dependence of the four-nucleon low-energy constants and show that their numerical values can be understood in terms of resonance saturation. This connects the effective field theory approach to boson exchange phenomenology. |