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The OPERA experiment (Oscillation Project with Emulsion tRacking Apparatus) is a long baseline appearance search for νμ→ντ oscillation. A pure νμ beam from CERN is sent to the 730 km far away LNGS underground laboratory in Italy where the OPERA detector is located. The charged current ντ interaction will produce a tau lepton which then can be identified according to its decay topology. The detection...
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