charm decays with photons in the final state and trigger counter ...

charma.uprm.edu

charm decays with photons in the final state and trigger counter ...

35Figure 4.2: Here the first efficiencies calculation of the H counters is presented. Oneof the most important details from this graph is its shape. Using the shape of thisefficiencies we later determined that there were a geometry problem with the detectorz position of our geometry definition file.After the raw data are reconstructed and saved in ntuplas we did our first efficienciescalculation. In order to calculate them we took the trajectories from all the charged particleson each event, projected them to the z position of the plane detector been studied andcalculate the x and y position of each particle on the plane. With these values we wereable to determine which counter from the detector the particle hit based on the detectorsgeometry description file in F. Vazquez’s earlier work. Once the counter was identified wechecked if it was on or off at that instance using the raw data block. The first detectorstudied was the H and the results are shown in the figure 4.2. This calculation was done

More magazines by this user
Similar magazines