- #1
Silviu
- 624
- 11
Homework Statement
Hello! This is actually a computational-statistics problem in data analysis, and I got a bit stuck. I have several events from a Monte Carlo simulation from 2 particles collision and for each event I have the primary vertex and the tracks associated to it. I wrote an algorithm which, given the tracks (and their parameters) reconstructs the primary vertex (PV). I want to calculate the efficiency of the algorithm (so the number of reconstructed PV vs the number of actual PV) in bins of number of tracks. I attached a plot I obtained. The 3 colors represent the threshold for the energy of the tracks I used to reconstruct the primary vertex (the minimum energy needed by a track). My professor said that I should also think about the probability of getting a given number of tracks with a given energy. For example, we get to 90% with 5 tracks above 10 GeV but we need 20 above 3 GeV for the same efficiency. However, the probability of getting a vertex having 3 tracks with 3GeV associated with it is different than the probability of having a vertex with 20 tracks with 10GeV. So, should I take this into account and weight somehow my histogram using that information? And if so, how should I do it? I am not sure how to account for the probability of getting a certain number of tracks associated with a certain vertex. Thank you!