Why the $a_1$ meson might be a difficult messenger for the restoration of chiral symmetry
| dc.creator | Vogel, Sascha | |
| dc.creator | Bleicher, Marcus | |
| dc.date | 2007-10-05 | |
| dc.date.accessioned | 2026-07-07T12:29:51Z | |
| dc.date.available | 2026-07-07T12:29:51Z | |
| dc.description | We perform a theoretical analysis of the $a_1$ resonance mass spectrum in ultra-relativistic heavy ion collisions within a hadron/string transport approach. Predictions for the $a_1$ yield and its mass distribution are given for the GSI-FAIR and the critRHIC energy regime. The potential of the $a_1$ meson as a signal for chiral symmetry restoration is explored. In view of the latest discussion, we investigate the decay channel $a_1 \to γπ$ in detail and find a strong bias towards low $a_1$ masses. This apparent mass shift of the $a_1$ if observed in the $γπ$ channel might render a possible mass shift due to chiral symmetry restoration very difficult to disentangle from the decay kinematics. | |
| dc.description | 4 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0710.1158 | |
| dc.identifier | http://arxiv.org/abs/0710.1158 | |
| dc.identifier | Phys.Rev.C78:064910,2008 | |
| dc.identifier | doi:10.1103/PhysRevC.78.064910 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215969 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Why the $a_1$ meson might be a difficult messenger for the restoration of chiral symmetry | |
| dc.type | text |