DELPHI Data Format
DELPHI Physics Data Structures
The Data Format
All DELPHI data sets, from raw data to Extended Short DSTs are written in
FZ exchange format. This allows members of the collaboration to transport data
easily from one computing architecture to another without having to convert
the data from one format to another.
From Raw data to processed DST's
There are five types of DELPHI data sets, all but one of which is derived from
one or more of the other types of data sets. The types of DELPHI data sets and
the point in the DELPHI data analysis and production stream where they are
produced is as follows:
The PostDST data are centraly produced on the Delhpi FARM.
private production of small Monte Carlo samples is organized
on some central computers.
- RAW data
, collected either by the DELPHI
or produced by
the DELPHI detector simulation program contain the electronic data read out by
the detector and, by size, are the largest of the DELPHI data sets
Full DST data ,
the DELPHI Data Reconstruction and Analysis Program from the DELPHI RAW
data, contain information about reconstructed charged tracks and neutrals
which may be used in physics analyses
Short DST data ,
produced by DSTANA, the DST Analysis and fixing package, and written by PHDST,
the DELPHI package for DST productions,
from the DELPHI DSTs are a more compact data set which allow faster analysis of
the physics data. These are used primarily by the hadronic teams in DELPHI
Extended short DST data
Long DST data ,
produced using the same software as the Short DST's, but contain the Full DST
information (with fixes and particle identifications), followed by the
Short DST structure.
These are used primarily by the DELPHI leptonic teams.