1 PHOS QA class for using in PbPb runs in the PWGPP QA train.
3 The main objective is to provide a user with an input for pi0 mass,
4 width and number-of-pi0-per-event trend plots in PbPb
5 runs. Unfortunately, large combinatorial background prevents from the
6 direct using of CaloCellQA framework for this, so the event mixing
7 technique is essential.
9 This class provides the standard set of 2D-histograms: invariant mass
10 of two clusters in PHOS vs their pT both for "real" and "mixed" events
11 for each of the three PHOS modules in centrality bins 0-20% and
12 20-100% (cen0 and cen1 in the histogram names, resp). Only clusters
13 with energy > 0.3 GeV and number of cells >2 are accepted.
15 "Mixed" histograms are identified by "Mi" in their names.
17 Requires no configuration.