Motivation

The motivation of this study is to check the influence of the local priors (from pp) and Default one (from PbPb) in the Lc analysis. Basically, different wagons were submitted:

• Best cuts + noPID

General Aspects

The Code was submitted with the following options for the Addtask

("Cutobjectfile.root",kFALSE,kFALSE,kFALSE,kTRUE,kFALSE,kFALSE,kFALSE,kFALSE,kFALSE,"NameTrain")

The option fillVarhistos was set to kFALSE. We are going to review the code soon.

Data and Train

LHC13b pass3 --> LegoTrain 151 LHC13c pass2 --> LegoTrain 152

Total Nevents: 99.3 Million events

1-- Results Comparisons PIDs + noPID

| Figure 1.1 - Production Cuts

| Figure 1.2 - Analysis Cuts

Conclusions

From the plots of Figures 1.1 and 1.2, one can concluded that no PID option provides much more background (as expected). The use of different priors, as shown by black and red points, gives a different number of candidates in the Invariant Mass plots.

For more detailed information concerning the data extraction --> https://twiki.cern.ch/twiki/bin/view/Main/Lambda-cpPbFeb11PIDPriors