Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.10: Poster

Thursday, March 13, 2008, 14:00–16:00, Poster C3

Analysis of charged η decays measured with WASA-at-COSY — •Christoph Florian Redmer¹, Michal Janusz^1,2, Leonid Yurev^1,3, Himani Bhatt⁴, Alexander Winnemöller⁶, Marcin Berlowski⁵, and Benedykt Ryszard Jany^1,2 for the WASA-at-COSY collaboration — ¹FZ Jülich — ²JU, Cracow, Poland — ³DLNP JINR, Dubna, Russia — ⁴IIT, Mumbai, India — ⁵Institute for Nuclear Studies, Warsaw, Poland — ⁶WWU Münster

The charged decay channels of the η-meson allow to study a variety of aspects related to the investigation of spontaneous symmetry breaking, the anomalies of QCD, the eta form factor and a possible flavor conserving CP violation.

WASA-at-COSY is a close to 4π detector setup for neutral and charged particles, located at the COoler SYnchrotron in Jülich. The high density pellet target and high quality beams make this facility predestined for the study of rare meson decays.

During the first production run of WASA-at-COSY, essentially dedicated to the measurement of η → 3π⁰, it was also possible to take data on charged decays in parallel. They are currently used to study the detector performance and to develop analysis steps specially focussed on η-decays involving leptons. For 2008 it is planed to have a high statistics production run dedicated to the conversion decays.

We report on the status of the analysis of charged decay channels of the η meson and the plans for the upcoming production run in 2008.

- Supported by BMBF.