Search for proton decay in the Frejus experiment

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Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....8..257b&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 8 p 257-260 (SEE N85-36066 24-93)

Physics

1

Calorimeters, Laboratories, Missions, Nucleons, Particles, Data Processing, Design Analysis, Leptons, Muons, Underground Structures

Scientific paper

The status of the Frejus experiment and the preliminary results obtained in the search for nucleon decay are discussed. A modular, fine grain tracking calorimeter was installed in the Frejus laboratory in the period extending from October 1983 to May 1985. The 3300 cubic meter underground laboratory, located in the center of the Frejus tunnel in the Alps, is covered in the vertical direction by 1600 m of rocks (4400 m w.e.). The average number of atmospheric muons in the lab is 4.2 square meters per day. The 912 ton detector is made of 114 modules, each one including eight flash chamber and one Geiger vertical planes of (6 x 6) square meters dimensions. The flash chamber (and Geiger) planes are alternatively crossed to provide a 90 deg. stereo reconstruction. No candidate for the nucleon decay into charged lepton is found in the first sample of events.

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