add diffractive_vmp

Closes: !100 (closed)

benchmarks/diffractive_vmp/analysis/diffractive_vm.cxx

@@ -96,8 +96,8 @@ TTreeReaderArray<float> emhits_x_array = {tree_reader, "EcalEndcapNRecHits.posit
 TTreeReaderArray<float> emhits_y_array = {tree_reader, "EcalEndcapNRecHits.position.y"};
 TTreeReaderArray<float> emhits_energy_array = {tree_reader, "EcalEndcapNRecHits.energy"};
 
-TTreeReaderArray<unsigned int> em_rec_id_array = {tree_reader, "EcalEndcapNClustersAssociations.recID"};
-TTreeReaderArray<unsigned int> em_sim_id_array = {tree_reader, "EcalEndcapNClustersAssociations.simID"};
+TTreeReaderArray<unsigned int> em_rec_id_array = {tree_reader, "EcalEndcapNClusterAssociations.recID"};
+TTreeReaderArray<unsigned int> em_sim_id_array = {tree_reader, "EcalEndcapNClusterAssociations.simID"};
 
 // Reconstructed particles pz array for each reconstructed particle
 TTreeReaderArray<float> reco_px_array = {tree_reader, "ReconstructedChargedParticles.momentum.x"};