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J/ production is an example of the kind of physics a muon detector could address. In this section the detectability of the reaction is studied. The primary charmed particles are generated with a flat rapidity in the range . The transverse momentum distribution used is given by the expression: where A=1.4 and is given in GeV. This value for the parameter A has been deduced by looking at production at SPPS and ISR energies (=63 and 540 GeV respectively). Varying A in the range 1-2 changes the results presented below by a few per cent. Then particles are decayed isotropically into two muons.

These muon pairs tend to be back-to-back in contrast with decay background. This is shown in Figure 3 where the opening angle between the two muons in the plane perpendicular to the beam is depicted for background and signal. Only muons with GeV are considered.

Therefore applying a cut in the opening angle a substantial rejection of the background can be achieved. The number of expected dimuon events from background and per thousand central AuAu events are shown in table 3. The number of in the muon channel per central AuAu event was found in [2]. As can be seen, the background rate after applying the momentum and opening angle cuts is relatively low, of the order of a percent. However the expected signal is still more than a order of magnitude lower.
Fri Apr 15 17:13:51 EDT 1994