Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Hadronenstruktur und -spektroskopie
HK 17.2: Talk
Monday, March 4, 2013, 17:00–17:15, HSZ-204
Investigating in-medium properties of the ω meson via the ω→π0γ decay — •Janus Weil1,2, Ulrich Mosel1, and Volker Metag3 — 1Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany — 2Present address: Frankfurt Institute for Advanced Studies (FIAS), Ruth-Moufang-Str. 1, D-60438 Frankfurt — 3II. Physikalisches Institut, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
We investigate the feasibility of studying in-medium properties of the ω meson in photoproduction experiments via the decay ω→π0γ. We use the GiBUU transport model to compare different methods of obtaining in-medium information, such as the invariant mass spectrum, transparency ratio, excitation function and momentum spectrum. We show that the final-state interaction of the pion poses a major obstacle for the interpretation of the invariant mass spectrum. We also demonstrate that the other three observables are fairly independent of final-state interactions and thus can give access to the ω in-medium properties.
Work supported by HIC-for-FAIR, HGS-HIRe and DFG under TR16.