What does the rho-meson do? In-medium mass shift scenarios versus hadronic model calculations
| dc.creator | Ruppert, Jorg | |
| dc.creator | Renk, Thorsten | |
| dc.date | 2006-09-29 | |
| dc.date.accessioned | 2026-07-07T11:07:39Z | |
| dc.date.available | 2026-07-07T11:07:39Z | |
| dc.description | The NA60 experiment has studied low-mass muon pair production in In-In collisions at $158 {\rm AGeV}$ with unprecedented precision. With these results there is hope that the in-medium modifications of the vector meson spectral function can be constrained more thoroughly than before. We investigate in particular what can be learned about collisional broadening by a hot and dense medium and what constrains the experimental results put on in-medium mass shift scenarios. The data show a clear indication of considerable in-medium broadening effects but disfavor mass shift scenarios where the $ρ$-meson mass scales with the square root of the chiral condensate. Scaling scenarios which predict at finite density a dropping of the $ρ$-meson mass that is stronger than that of the quark condensate are clearly ruled out since they are also accompanied by a sharpening of the spectral function. | |
| dc.description | Proceeding contribution, Talk given by J. Ruppert at Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions (Hot Quarks 2006), Villasimius, Sardinia, Italy, 15-20 May 2006. To appear in EPJC | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0609083 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0609083 | |
| dc.identifier | Eur.Phys.J.C49:219-224,2007 | |
| dc.identifier | doi:10.1140/epjc/s10052-006-0072-y | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/189912 | |
| dc.subject | Nuclear Theory | |
| dc.title | What does the rho-meson do? In-medium mass shift scenarios versus hadronic model calculations | |
| dc.type | text |