Detector Resolution

The Monte Carlo data can be used to show the detector resolution for the CC events. Figure 4.1(a) and (b) show the detector response for $({{E_{\mbox{\em tot}}}\, - \, {P_z}})$ and ${P_t}$ respectively. The reconstructed value is shown on the vertical, the true value on the horizontal axis. Clearly the reconstructed value is systematically lower than the true value. This stems from the fact that the particles have to pass through inactive material before reaching the UCAL and thus lose energy. Figure 4.2(a) shows the ${P_t}$ resolution as function of ${P_t}$. The resolution is about for small ${P_t}$ ( ) and less than for larger ${P_t}$ values. Figure 4.2(b) shows the quality of the vertex reconstruction - only events for which a vertex is reconstructed are shown. The vertex resolution is about .

Figure: The detector response for (a) and ${P_t}$ reconstruction (b). The reconstructed value is shown on the vertical, the true on the horizontal axis.

Figure 4.2: The detector resolution for ${P_t}$ reconstruction (a) and response for vertex reconstruction (b). The reconstructed value is shown on the vertical, the true on the horizontal axis.