München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 37: Kern- und Teilchen-Astrophysik

HK 37.6: Vortrag

Mittwoch, 22. März 2006, 17:45–18:00, E

PERKEO III - A New Neutron Decay Spectrometer — •Bastian Märkisch, Hartmut Abele, Dirk Dubbers, and Marc Schumann — Physikalisches Institut, Universität Heidelberg

The decay of free neutrons offers unique insight into the weak interaction at low energies and allows high precision tests of the Standard Model. E.g. did a recent measurement of the β-asymmetry A (the asymmetry in the angular distribution of electrons relative to the neutron spin) precisely derive the coupling strength of the charged weak interaction and V_ud, the first element of the CKM matrix.

We have developed and are currently assembling PERKEO III, a new instrument to study various parameters of neutron decay. It has the sensitivity to measure small induced energy dependent terms like the weak magnetism form factor. We report on the current status and the first planned measurements.