Abstract
Various differential cross sections for elastic scattering of 21.5 MeV positive and negative pions by Si, Ca, Ni, and Zr were investigated using pion-nucleus (πN) potential across the threshold. The 'anomalous' repulsion in the s-wave term was also observed. The extra repulsion was described in terms of a chiral-motivated model where the pion decay constant is modified in the medium. The results show that with the inclusion of chiral-motivated model, it is possible to reconcile the pion-nucleus interaction with free pion-nucleon interaction, removing the anomaly in isovector channel.
| Original language | English |
|---|---|
| Article number | 122302 |
| Pages (from-to) | 122302-1-122302-4 |
| Journal | Physical Review Letters |
| Volume | 93 |
| Issue number | 12 |
| DOIs | |
| State | Published - 17 Sep 2004 |
| Externally published | Yes |
Bibliographical note
Funding Information:We wish to acknowledge many stimulating discussions with A. Gal. This work was supported in part by the German Ministry of Education and Research (BMBF) under Contracts No. 06 TU 987I and No. 06 TU 201 and the Deutsche Forschungsgemeinschaft (DFG) through the European Graduate School 683 and Heisenberg Program.
Funding
We wish to acknowledge many stimulating discussions with A. Gal. This work was supported in part by the German Ministry of Education and Research (BMBF) under Contracts No. 06 TU 987I and No. 06 TU 201 and the Deutsche Forschungsgemeinschaft (DFG) through the European Graduate School 683 and Heisenberg Program.
| Funders | Funder number |
|---|---|
| European Graduate School 683 and Heisenberg Program | |
| Deutsche Forschungsgemeinschaft | |
| Bundesministerium für Bildung und Forschung | 06 TU 201, 06 TU 987I |