Studies of the Decay η→π+π-π0 with WASA-at-COSY

Adlarson, Patrik, 1979- (author): Uppsala universitet,Kärnfysik,WASA-at-COSY

Höistad, Bo, Professor Emeritus (thesis advisor): Uppsala universitet,Kärnfysik

Bossi, Fabio, Professor (opponent): Laboratori Nazionali di Fisica, INFN-LNF

(creator_code:org_t)

Related links:: https://uu.diva-port... (primary) (Raw object); show more...; https://urn.kb.se/re...; show less...

Abstract Subject headings

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.

By the author/editor: Adlarson, Patrik ...; Zlomanczuk, Joze ...; Höistad, Bo, Pro ...; Bossi, Fabio, Pr ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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