Studies of the Decay η→π+π-π0 with WASA-at-COSY
2012 (English)Doctoral thesis, monograph (Other academic)
In 2008 a large statistics sample of approximately 1·107 η-decays has been collected with the WASA detector at COSY using the pd→3Heη reaction at the beam kinetic energy of 1 GeV. These data are being used to study the not so rare η decays involving charged pions, like η→π+π-π0. This decay proceeds mainly via a strong isospin violating contribution, where the decay width is proportional to the light quark mass difference squared, (md-mu)2. In addition this decay can be used to search for C-violating effects. The analysis is presented and the Dalitz plot parameters with statistical and systematical uncertainties are determined from a sample of 1.33·105 η→π+π-π0 events in the Dalitz plot. The asymmetry parameters with statistical uncertainties are presented which show no evidence of C-violation.
Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2012. , 160 p.
Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-2516 ; 100
Hadron physics, Chiral Perturbation Theory, Isospin violation, Quark masses, Symmetries, Advanced Instrumentation
Research subject Nuclear Physics
IdentifiersURN: urn:nbn:se:uu:diva-181236ISBN: 978-91-554-8476-7OAI: oai:DiVA.org:uu-181236DiVA: diva2:555484
2012-11-02, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 10:15 (English)
Bossi, Fabio, Professor
Zlomanczuk, Jozef, DocentHöistad, Bo, Professor Emeritus
FunderEU, FP7, Seventh Framework ProgrammeKnut and Alice Wallenberg Foundation