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Expected sensitivity

The experiment is left with 1.3 background events for a total number of charged current interaction induced by . If 1 event is really observed this implies a 90% C.L. upper limit of 3.2 events. The corresponding oscillation probability is . The limit in the mixing angle, for large , is:

For full mixing, the minimum detectable at 90% C.L. is 0.1 .

The exclusion plot in the plane - is given in Fig. 18. The curve bounds the areas that are excluded at 90% C.L. if no oscillation signal over the expected background is found. The expected sensitivity of CHORUS and NOMAD after a 4 years run (1994-1997) is also shown, as well as the present best limit.

  
Figure 18: Exclusion plot (90% C.L.) in the plane - .

In a scenario involving a small and a second large [17] this experiment would observe about 20 events.

Given the 1% content of the beam, this experiment will also set a limit on on oscillation for large , with a minimum detectable for full mixing.