$ρ$-meson properties at finite nuclear density
| dc.creator | Kondratyuk, L. A. | |
| dc.creator | Sibirtsev, A. | |
| dc.creator | Cassing, W. | |
| dc.creator | Golubeva, Ye. S. | |
| dc.creator | Effenberger, M. | |
| dc.date | 1998-01-27 | |
| dc.date | 1998-06-06 | |
| dc.date.accessioned | 2026-07-07T11:11:33Z | |
| dc.date.available | 2026-07-07T11:11:33Z | |
| dc.description | We calculate the momentum dependence of the $ρ$-meson selfenergy based on the dispersion relation for the $ρN$ scattering amplitude $f(ω$) at low nuclear density. The imaginary part of $f(ω)$ is determined from the optical theorem, while the total $ρN$ cross section is obtained within the VDM at high energy and within the resonance model at low energy. Our numerical results indicate a sizeable broadening of the $ρ$-meson width in the medium especially for low relative momenta $p$ while the real part of the $ρ$ selfenergy is found to change its sign and becomes repulsive already at momenta above 100 MeV/c. Extrapolating to nuclear saturation density $ρ_0$ we find a dropping of the $ρ$-mass for $p \approx$ 0 in line with the QCD sumrule analysis of Hatsuda while at high energy an increase of the $ρ$-mass in line with the prediction by Eletsky and Joffe is obtained. However, when including a broadening of the baryonic resonances in the medium, the $ρ$-meson mass shift at $p \approx$ 0 becomes slightly repulsive whereas the width increases substantially. | |
| dc.description | 20 pages, LaTeX, including 7 ps-figures, UGI-97-4, revised version, to be pub. in Phys. Rev. C | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9801055 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9801055 | |
| dc.identifier | Phys.Rev.C58:1078-1085,1998 | |
| dc.identifier | doi:10.1103/PhysRevC.58.1078 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191131 | |
| dc.subject | Nuclear Theory | |
| dc.title | $ρ$-meson properties at finite nuclear density | |
| dc.type | text |