Nuclear medium corrections and chiral cancellation in the pion-nucleus optical potential
The near cancellation of the pi-nuclear contributions from the lowest order non-linear terms in the Weinberg chiral lagrangian for pion-nucleon systems is re-examined in the presence of nuclear medium polarization in a popular model for these corrections. It is demonstrated that this near cancellati...
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| Published in | Physics letters. B Vol. 141; no. 3; pp. 153 - 156 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.01.1984
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| Online Access | Get full text |
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| Summary: | The near cancellation of the pi-nuclear contributions from the lowest order non-linear terms in the Weinberg chiral lagrangian for pion-nucleon systems is re-examined in the presence of nuclear medium polarization in a popular model for these corrections. It is demonstrated that this near cancellation persists to all orders in isobar-hole pairs in spite of the further enhancement of the already large individual contributions to the S-wave pion-nucleus optical potential. |
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| ISSN: | 0370-2693 1873-2445 |
| DOI: | 10.1016/0370-2693(84)90193-X |