Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 74: Fundamental Symmetries
HK 74.4: Talk
Thursday, March 19, 2009, 17:30–17:45, H-ZO 70
Search for scalar interaction with the WITCH experiment - status & outlook — •Peter Friedag1, Marcus Beck1, Jonas Mader1, Christian Weinheimer1, Nausikaa Geraert2, Nathal Severijns2, Michael Tandecki2, Emil Traykov2, Simon van Gorp2, Frederik Wauters2, and Alexander Herlert3 — 1Institut für Kernphysik, WWU Münster, Wilhelm-Klemm Str. 9, 48149 Munster, Germany — 2Instituut voor Kern- en Stralingsfysica, K.U.Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium — 3CERN, CH-1211 Geneve 23, Switzerland
The WITCH experiment examines the nuclear beta decay of ions stored in a penning trap using a retardation spectrometer. With this experiment we measure the recoil spectrum, from which one can derive the beta neutrino angular correlation a. This allows us to search for a scalar interaction contribution in the weak interaction. The goal is to measure a with a precision of Δ a<0.5%.
In 2008 and 2009 various enhancements of the experimental setup have been carried out. Therefore many components of the system were modified and upgraded. In support of this, we performed tracking simulations and field calculations, that were also used for a further analysis of the measurement from 2006. This talk reviews the current status of the simulations as well as the experiment and gives an outlook for this year.
This project is supported by BMBF under contract number 06MS270.