Rho meson broadening in hot and dense hadronic matter
The modification of the width of rho mesons due to in-medium decays and collisions is evaluated. The decay width is calculated from the imaginary part of the one-loop selfenergy at finite temperature. The collision width is related to the cross sections of the rho + pion and the rho + nucleon reactions. A calculation based on an e ective Lagrangian shows the importance of including the direct pho pi - > pho pi scattering which is dominated by the a1 exchange. A large broadening of the spectral function is found, accompanied by a strength suppression at the pole. http://www.arxiv.org/abs/nucl-th/9812059
| Author: | Song Gao, Charles Gale, Christoph Ernst, Horst Stöcker, Walter Greiner |
|---|---|
| URN: | urn:nbn:de:hebis:30-22884 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 08.12.2005 |
| Year of first Publication: | 1999 |
| Publishing Institution: | Univ.-Bibliothek Frankfurt am Main |
| Tag: | In-Medium Zerfall; Rho-Meson ; Verbreitung broadening ; in-medium decay; rho meson |
| Source: | http://www.arxiv.org/abs/nucl-th/9812059, Version 2 vom Mon, 21 Jun 1999 |
| HeBIS PPN: | 185389619 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Veröffentlichungsvertrag für Publikationen ohne Print on Demand |
