High ET Tail Investigation

Here I detail my investigations into the high ET tail.

Figure 1: Transverse energy of Jet 1 (Red) and Jet 2 (Blue).

I started investigating the tail of this distribution by looking at the number of events above a transverse energy of 30 for each run. The list of runs and the number of events above ET = 30GeV is here. There looks to be a pretty obvious discontinuity at run 10150051. So I have made a series of plots for all runs, runs before 10150051 and runs after and including 10150051.

Figure 2: Jet 1Phi Vs Eta for all events.

Figure 3: ET spectrum for all events (Black), spectrum for events outside the two hot regions (Red), and spectrum for events inside the two hot regions (Blue). This is for all runs.

Figure 4: Jet 1 Phi Vs Eta for events before run 10150051.

Figure 5: ET spectrum for all events (Black), spectrum for events outside the two hot regions (Red), and spectrum for events inside the two hot regions (Blue). This is for runs before 10150051.

Figure 6: Jet 1 Phi Vs Eta for events including and after run 10150051.

Figure 7: ET spectrum for all events (Black), spectrum for events outside the two hot regions (Red), and spectrum for events inside the two hot regions (Blue). This is for runs including and after run 10150051.

 I have also attached the output from the online L2 Jet monitoring plots for runs 10150025 and 10150051, as well as the P-Plots from runs 10150025 and 10150051. In particular, I have been looking for any differences which may help me figure out what caused the sudden jump in counts above ET = 30 and the apperance of the two 'hot spots'.