Frankfurt 2014 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Hadronenstruktur und -spektroskopie
HK 18.4: Talk
Tuesday, March 18, 2014, 15:00–15:15, HZ 3
Investigation of the p+d→ 3He+η′ reaction at WASA-at-COSY* — •Nils Hüsken, Florian Bergmann, Kay Demmich, Patrice Hüsemann, Alexander Täschner, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster
The η′(958) meson is of special interest, because its higher mass compared to other pseudoscalar mesons is directly related to the UA(1) problem of QCD. Recent theoretical works discuss studies on the formation of η′(958)-mesic nuclei as a possibility to investigate an in-medium modification of the η′ mass. Such a modification could shed light on the mechanism responsible for the generation of the η′ mass.
With the WASA-at-COSY setup two test beam times on proton-deuteron collisions were carried out at proton kinetic energies of Tp=1800 MeV and Tp=1850 MeV respectively to investigate the possibility to perform studies on the η′ production in the proton-deuteron fusion at this installation. First results of the analysis of both beamtimes will be presented, focusing on the production of both the ω(782) meson, used for normalization purposes, and the η′(958) meson.
*Supported by COSY-FFE grants