Effect of a Staged End-Cap Chamber Deployment on MDT System Performance

This paper evaluates the muon track reconstruction and momentum resolution when specific arrays of mid-section or outer end-cap chambers are not deployed, compared to abaseline configuration having a full complement of chambers. The effect on Higgs physics for the 4-muon decay channel is also assessed. If either of the above chamber sets are not in place the momentum resolution, over the $P_t$ range from 20-500 GeV and corresponding rapidity ranges $1.0<\eta<1.37$ and $1.34<\eta<2.7$ is degraded. The number of unreconstructed tracks and the occupancy of non-Gaussian tails increases significantly. This resolution change results in a 15\% wider mass peak for Higgs masses near 150 GeV . The increased background admitted by a wider peak could erode a possible signal into marginality.