.. _eventgenerators:

Event Generators
================


An event generator simulates the interaction of the beam with the target material.
Several types of event generators exist in PandaRoot:

* **Background generators**
  They generate the most important physics processes with the highest cross-sections:

  * :doc:`FTFGenerator` is the current standard background generator
  * :doc:`DPMGenerator` is the previous generator still usable within PandaRoot


* **Event generators**
  They generate one specific physics channel :doc:`EvtGen`.

  
* **Box generators**
  They do not simulate an interaction but produce particles of a given type with defined distributions. Therefore they are also often called
  particle guns.

  In PandaRoot two different box generators exists:

  * :doc:`BoxGenerator` is the standard particle gun which distributes the particles in a random pattern within given boundaries
  * :doc:`FixStepParticleGun` is almost identical to the Box generator but distributes the particles in a fixed pattern

.. toctree::
   :maxdepth: 2
   :caption: Contents:
   :hidden:
   
   EvtGen
   FTFGenerator
   DPMGenerator
   BoxGenerator
   FixStepParticleGun