Here is a table that breaks down the number of signal and background events w.r.t. N(live), N(tracks), and N(pi0s). N(live) is as defined before. N(tracks) and N(pi0s) are the tracks and pi0s in a given cluster with the given N(live). The most signal-like bins are:
| N(live) | N(tracks) | N(pi0s) | N(signal) | N(bg) | Significance |
|---|---|---|---|---|---|
| 2 | 4 | 9 | 0.03 | 0 | 0.054 |
| 2 | 2 | 1 | 2.63 | 7077 | 0.031 |
| 2 | 2 | 0 | 6.32 | 44781 | 0.03 |
| 2 | 2 | 2 | 1.55 | 2959 | 0.029 |
| 3 | 2 | 2 | 2.28 | 6436 | 0.028 |
| 3 | 2 | 3 | 1.26 | 2416 | 0.026 |
| 2 | 1 | 2 | 2.43 | 10771 | 0.023 |
Notice that the most “signal-like” entries are in N(live)=2 and N(live)=3.
I want to do 2 more things with this table:
- Change the counting of N(tracks) to count the soft tracks in the cluster cone that do not pass threshold. I did a similar thing earlier when calculating N(live).
- Require the presence of a soft electron inside the cluster and recalculate the table. I expect clusters containing a soft electron to be more signal-like. We might be able to get further separation for those SE-tagged clusters by looking at N(live), N(track), N(pi0).
–Dan