Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.71: Poster
Donnerstag, 19. März 2009, 14:00–16:00, Audi-Max
Search for Symmetry Breaking Patterns with WASA-at-COSY — •Christian Pauly — Institut für Kernphysik and Jülich Center for Hadron Physics, D-52425 Jülich, Germany
Key issues of the WASA-at-COSY physics program are the study of symmetries and symmetry breaking patterns in low energy hadronic processes within the non-perturbative regime of QCD. High statistic measurements of η and η′ meson decays are used to search for violations of isospin symmetry, and to test conservation of fundamental C, P and CP symmetries. A precise measurement of charge symmetry breaking in the isospin violating process dd→α π0 is another important part of the physics program.
During the last year data have been obtained on several of the WASA key experiments. In particular, in fall 2008, a large data sample of ≥ 107 η-decays was produced in the reaction pd → 3He η. The reaction allows for the tagging of the produced η mesons merely by identification of the 3He particle, covering all η decay channels. A second η production run on pp → pp η focused on the study of η decays into charged particles, especially η → π+ π− e+ e−, which allows to search for an unconventional form of flavour conserving CP violation.
We present an overview of the experiment and status of the analysis.
— supported by BMBF, DAAD and Wallenberg Foundation