Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-11-02
Nucl.Phys.A677:313-366,2000
Physics
Nuclear Physics
Nuclear Theory
61 pages, journal version, typos in Eq.(39) fixed, results unchanged
Scientific paper
10.1016/S0375-9474(00)00221-9
The 1S0, 3S1, and 3D1 nucleon-nucleon scattering phase shifts are calculated at next-to-next-to-leading order (NNLO) in an effective field theory. Predictions for the 1P1, 3P0, 3P1, 3P2, 1D2, 3D2, and 3D3 phase shifts at this order are also compared with data. The calculations treat pions perturbatively and include the NNLO contributions from order $Q_r^3$ and $Q_r^4$ radiation pion graphs. In the 3S1, 3D1, 3P0, and 3P2 channels we find large disagreement with the Nijmegen partial wave analysis at NNLO. These spin triplet channels have large corrections from graphs with two potential pion exchange which do not vanish in the chiral limit. We compare our results to calculations within the Weinberg approach, and find that in some spin triplet channels the summation of potential pion diagrams seems to be necessary to reproduce the observed phase shifts. In the spin singlet channels the nonperturbative treatment of potential pions does not afford a significant improvement over the perturbative approach.
Fleming Sean
Mehen Thomas
Stewart Iain W.
No associations
LandOfFree
NNLO Corrections to Nucleon-Nucleon Scattering and Perturbative Pions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with NNLO Corrections to Nucleon-Nucleon Scattering and Perturbative Pions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NNLO Corrections to Nucleon-Nucleon Scattering and Perturbative Pions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-714985