[PWG-LF] add centrality MC into spectra (#6427)

Author: njacazio

PWGLF/DataModel/spectraTOF.h

@@ -19,6 +19,8 @@
 #ifndef PWGLF_DATAMODEL_SPECTRATOF_H_
 #define PWGLF_DATAMODEL_SPECTRATOF_H_
 
+#include <memory>
+
 // O2 includes
 #include "ReconstructionDataFormats/Track.h"
 #include "Framework/runDataProcessing.h"
@@ -48,12 +50,13 @@ static constexpr int NCharges = 2;
 static constexpr PID::ID NpCharge = Np * NCharges;
 static constexpr const char* pT[Np] = {"e", "#mu", "#pi", "K", "p", "d", "t", "{}^{3}He", "#alpha"};
 static constexpr const char* pN[Np] = {"el", "mu", "pi", "ka", "pr", "de", "tr", "he", "al"};
-static constexpr const char* cN[Np] = {"pos", "neg"};
+static constexpr const char* cN[NCharges] = {"pos", "neg"};
 static constexpr const char* pTCharge[NpCharge] = {"e^{-}", "#mu^{-}", "#pi^{+}", "K^{+}", "p", "d", "t", "{}^{3}He", "#alpha",
                                                    "e^{+}", "#mu^{+}", "#pi^{-}", "K^{-}", "#bar{p}", "#bar{d}", "#bar{t}", "{}^{3}#bar{He}", "#bar{#alpha}"};
 static constexpr int PDGs[NpCharge] = {kElectron, kMuonMinus, kPiPlus, kKPlus, kProton, 1000010020, 1000010030, 1000020030, 1000020040,
                                        -kElectron, -kMuonMinus, -kPiPlus, -kKPlus, -kProton, -1000010020, -1000010030, -1000020030, -1000020040};
 
+std::shared_ptr<TH2> hMultiplicityvsPercentile;
 static constexpr std::string_view hnsigmatpctof[NpCharge] = {"nsigmatpctof/pos/el", "nsigmatpctof/pos/mu", "nsigmatpctof/pos/pi",
                                                              "nsigmatpctof/pos/ka", "nsigmatpctof/pos/pr", "nsigmatpctof/pos/de",
                                                              "nsigmatpctof/pos/tr", "nsigmatpctof/pos/he", "nsigmatpctof/pos/al",