Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 43: Nuclear Structure/Spectroscopy VII

HK 43.6: Talk

Thursday, March 11, 2004, 18:15–18:30, A

The WITCH Experiment — •M. Beck¹, F. Ames², D. Beck³, S. Coeck¹, P. Delahaye², B. Delauré¹, V.V. Golovko¹, C. Guenaut⁴, V.Yu. Kozlov¹, A. Lindroth¹, I.S. Kraev¹, T. Phalet¹, N. Severijns¹, and S. Versyck¹ — ¹Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven — ²CERN, CH-1211 Geneva, Switzerland — ³GSI-Darmstadt, Postfach 110552, D64220 Darmstadt, Germany — ⁴Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, F-91405 Orsay, France

The WITCH experiment will measure the energy spectrum of the recoil ions after β-decay with the aim to test the Standard Model of the electroweak interaction. A first measurement will take place in 2004. Initially, a search for scalar (S) interaction will be performed. In this presentation an overview over present searches for S-interaction will be given and the experimental principle of the WITCH experiment will be described. In addition, other prospective physics topics that can be investigated with the WITCH experiment will be discussed. These include, among others, measurements of weak magnetism and the determination of Q-values and of EC/β⁺ branching ratios. Details of the experimental setup will be described in other presentations during this meeting.