Münster 2002 – wissenschaftliches Programm

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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.
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