Vtx Identification

Script name: Definitions.h

Description: Header file where simulation and vertex variables and trees are declared.

The name of the simulation files needs to be set here.

Script name: vtx_MC_analysis.C

Description:

• Code for the identification of vertices reconstructed by FEDRA using a MC simulation.

• The code provides most probable event and mother ID for each vertex, the number of electrons, primaries and charm daughters. A flag, charm_daug tells about the presence of a charm daughter in a vertex.

• It requires as input file the vertex file usually called "vertextree_test.root" and a simulation file.

• It provides in output the file called "vtx_MC_analysis.root" that is used as input for the BDTs studies (see README_BDT.txt).

List of variables:

1. mp_eventID --> Most probable montecarlo id of the vertex

2. mp_motherID --> Most probable montecarlo mother id of the vertex

3. mp_pdgID --> Most probable pdg id of the vertex

4. charm_daug --> If 0 no charm daughter tracks in the vertex, if 1 a least one charm daughter in the vertex

5. n_electrons --> Number of electrons in the vertex (even if the montecarlo id is different from mp_eventID)

6. n_primaries --> Number of primary daughter tracks (mother id of the track is -1)

7. n_charmdaug --> Number of charm daughter tracks (mother id of the track is 1 or 2)

8. n_events --> Number of montecarlo events linked to the vertex (ideal case == 1)

9. n_mothers --> Number of mother IDs linked to the vertex (ideal case == 1)

Usage:

• root -l

• .L vtx_MC_analysis.C

• myrun()