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Study of the decay eta -> pi(+)pi(-)pi(0) with WASA-at-COSY
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
2012 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T150, 014001- p.Article in journal (Refereed) Published
Abstract [en]

Recently, a large statistics sample of approximately 3 x 10(7) eta decays was collected with the Wide Angle Shower Apparatus (WASA) detector at COoler SYnchrotron (COSY) using the pd -> He-3 eta reaction at the proton kinetic energy of 1 GeV. These data are being used to study the not so rare eta decays involving charged pions, such as eta -> pi(+)pi(-)pi(0). This decay proceeds mainly via a strong isospin violating contribution, where the decay width is proportional to the light quark mass difference squared, (m(d) - m(u))(2). The status of the analysis is presented, which preliminarily gives 1.8 x 10(5) eta -> pi(+)pi(-)pi(0) candidates in the Dalitz plot.

Place, publisher, year, edition, pages
2012. Vol. T150, 014001- p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-185202DOI: 10.1088/0031-8949/2012/T150/014001ISI: 000309605500002OAI: oai:DiVA.org:uu-185202DiVA: diva2:571424
Available from: 2012-11-22 Created: 2012-11-21 Last updated: 2012-11-22Bibliographically approved

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