Data-Model.md

@@ -105,6 +105,7 @@ A cell represents the real responce of a cell of the e.m. calorimeter. It has on
 | std::vector<int> | hindex2 | Indices of the hits producing the photo-electrons. It has one-to-one correspondence with pe_time2 |
 
 **Cluster**
+
 The cluster is a set of cell grouped on the basis track that produced them. It has a one-to-many correspondence with the cell.
 
 | Type | Name | Description |
@@ -121,3 +122,9 @@ The cluster is a set of cell grouped on the basis track that produced them. It h
 | double | vary | Variance in Y of the cluster |
 | double | varz | Variance in Z of the cluster |
 | std::vector<cell> | cells | Vector of the cell associated to the cluster |
+
+**Particle**
+
+| Type | Name | Description |
+| ------ | ------ | ------ |
+