//TFile* response_file = TFile::Open("./Phys/DecayTreeTuple/data/response_matrix_norm_pA_MD_MCsim09e_2.0_4.8_Ncorr_eta1_multi_dep.root", "READ"); // In local
TFile* response_file = TFile::Open("response_matrix_norm_pA_MD_MCsim09e_2.0_4.8_Ncorr_eta1_multi_dep.root", "READ"); // In Dirac