Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HK: Physik der Hadronen und Kerne

HK 38: Theory VI

HK 38.4: Vortrag

Donnerstag, 14. März 2002, 14:45–15:00, C

Photoproduction of φ mesons off nuclei — •Pascal Mühlich, Thomas Falter, Carsten Greiner, Jürgen Lehr, Marcus Post, and Ulrich Mosel — Institut für Theoretische Physik, Universität Gießen, Germany

We investigate the consequences of possible medium modifications of the φ meson in nuclear matter on φ photoproduction off nuclei. Various models predict both a mass-shift and/or a in-medium broadening of the φ meson at finite nuclear matter density [1][2]. In principle, photoproduction provides a clean method to learn about the in-medium properties of the φ meson. Our purpose is to check the feasability of a proposed experiment [3], in which one tries to observe the φ properties through the K⁺K⁻-invariant mass spectrum, restricting the momentum of the φ to small values. In our calculation, we use the BUU transport model, which allows for a detailed analysis of the final state interactions both of the φ and the kaons. Due to these effects, we find only a small sensitivity of the K⁺K⁻-invariant mass distribution on the in-medium properties of the φ.

Work supported by DFG and BMBF.
G. E. Brown, M. Rho, PRL 66 (1991), 2720.
E. Oset, A. Ramos, NPA 679 (2001), 616.
T. Nakano et al., NPA 684 (2001), 71.