Interacting pion pairs in nuclear matter
| dc.creator | Grion, Nevio | |
| dc.date | 2000-04-18 | |
| dc.date.accessioned | 2026-07-07T05:36:39Z | |
| dc.date.available | 2026-07-07T05:36:39Z | |
| dc.description | The pion-production $π^+ A \to π^+π^{\pm} A'$ reactions were studied on nuclei $^{2}H$, $^{12}C$, $^{40}Ca$ and $^{208}Pb$ at a pion energy of $T_{π^{+}}$=283 MeV using the CHAOS spectrometer. The experimental results are reduced to differential cross sections and compared to both theoretical predictions and reaction phase space. Near the $2m_π$ threshold pion pairs couple to $(ππ)_{I=J=0}$ when produced in the $π^+\to π^+π^-$ reaction channel. The $\cal C$$_{ππ}^A$ ratio between the $π^{+}π^{\pm}$ invariant masses on nuclei and on the nucleon is also presented. The marked near-threshold enhancement of $\cal C$$_{π^+π^-}^A$ is consistent with theoretical predictions addressing the partial restoration of chiral symmetry. On the opposite, nuclear matter weakly influences $\cal C$$_{π^+π^+}^A$. | |
| dc.description | 10 pages, 5 figures, PS format. Talk presented at the International Workshop XXVIII on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, Austria, January 16-22, 2000 | |
| dc.identifier | https://arxiv.org/abs/nucl-ex/0004007 | |
| dc.identifier | http://arxiv.org/abs/nucl-ex/0004007 | |
| dc.identifier | Hadrons in Dense Matter, Proc. of the International Workshop XXVIII on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, Austria, January 16-22, 2000 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/81063 | |
| dc.subject | Nuclear Experiment | |
| dc.title | Interacting pion pairs in nuclear matter | |
| dc.type | text |