The beam and detector for a high-precision measurement of CP violation in neutral-kaon decays

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Abstract

The K0 beam and detector used for a high-precision measurement of the CP-violation parameter ϵ′ at the CERN Super Proton Synchrotron (SPS) are described. The beam provides KL and KS alternately through a common decay region. The detection of the decays is based on wire chambers and calorimeters without employing a magnet. The trigger and readout system achieve a high selectively for the suppressed, CP-violating, two-pion decays of the KL by incorporation of hard-wired processors. The readout is based on Fastbus for maximum data rates.

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Present address: Fachbereich Physik, Univ. Siegen, FRG.

∗∗

Present address: Istituto di Fisica and Sezione INFN, Pisa, Italy.

∗∗∗

Present address: Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt, Cologne, FRG.

+

Present address: LAL, Univ. Paris Sud, Orsay France.

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Present address: DESY, Hamburg, FRG.

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Present address: II. Inst. für Exp. Physik der Univ. Hamburg, FRG.

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See acknowledgements.

§

Present address: Robert Bosch GmbH, Nuremberg, FRG.

§§

Present address: H.T. Heinen & Thux, Koblenz, FRG.

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