dorsal/arxiv
View SchemaComment on Neutron-Proton Spin-Correlation Parameter A_{ZZ} at 68 Mev
| Authors | R. Machleidt, I. Slaus |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9303022 |
| URL | https://arxiv.org/abs/nucl-th/9303022 |
| DOI | 10.1103/PhysRevLett.72.2664 |
| Journal | Phys.Rev.Lett. 72 (1994) 2664 |
Abstract
We present two arguments indicating that the large value for the $\epsilon_1$ mixing parameter at 50 MeV, which the Basel group extracted from their recent $A_{zz}$ measurement, may be incorrect. First, there are nucleon-nucleon (NN) potentials which predict the $\epsilon_1$ at 50 MeV substantially below the Basel value and reproduce the Basel $A_{zz}$ data accurately. Second, the large value for $\epsilon_1$ at 50 MeV proposed by the Basel group can only be explained by a model for the NN interaction which is very unrealistic (no $\rho$-meson and essentially a point-like $\pi NN$ vertex) and overpredicts the $\epsilon_1$ in the energy range where it is well determined (150--500 MeV) by a factor of two.
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"abstract": "We present two arguments indicating that the large value for the $\\epsilon_1$\nmixing parameter at 50 MeV, which the Basel group extracted from their recent\n$A_{zz}$ measurement, may be incorrect. First, there are nucleon-nucleon (NN)\npotentials which predict the $\\epsilon_1$ at 50 MeV substantially below the\nBasel value and reproduce the Basel $A_{zz}$ data accurately. Second, the large\nvalue for $\\epsilon_1$ at 50 MeV proposed by the Basel group can only be\nexplained by a model for the NN interaction which is very unrealistic (no\n$\\rho$-meson and essentially a point-like $\\pi NN$ vertex) and overpredicts the\n$\\epsilon_1$ in the energy range where it is well determined (150--500 MeV) by\na factor of two.",
"arxiv_id": "nucl-th/9303022",
"authors": [
"R. Machleidt",
"I. Slaus"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevLett.72.2664",
"journal_ref": "Phys.Rev.Lett. 72 (1994) 2664",
"title": "Comment on Neutron-Proton Spin-Correlation Parameter A_{ZZ} at 68 Mev",
"url": "https://arxiv.org/abs/nucl-th/9303022"
},
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