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City in Italy where BaBar collaboration meetings are held from time to time.

The BaBar electromagnetic calorimeter, (EMC), is a fully projective CsI(TI) crystal calorimeter.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/detector/detector.html#systems)

This is the neutral partical trigger of the detector's Level 1 trigger system.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Detector/Trigger/trigger_whatsit.html)

An energy deposition in the Babar EMC by either a photon or an electron is one example of an electromagnetic shower. When a high-energy photon passes near a heavy nucleus (Cs or I in the EMC), it can convert into an electron-positron pair. Similarly, a high-energy electron passing near the nuclues can radiate a photon. Either of these events leads to a rapid chain reaction, with one high-energy particle giving rise to many low-energy photons, which are measured by the EMC.

The building on the IR2 hall floor which houses the off-detector electronics. There are electronics on the first level and electronics and utilities on the roof.

Elf is a package of the BaBar SRT . It is for integrating Bear and Online Prompt Reconstruction (OPR). Look at the README file in the package for more information.

Elf is a package in the BaBar software repository. Elf is a package for integrating Bear and online Prompt Reconstruction. Check out the head version of the package for any documentation.

This is the specific I/O board used in the end-cap region of the EMC DAQ system. There is another I/O board used in the barrel region of the EMC DAQ, see BIOB.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Detector/DAQ/Calorimeter/WriteUps/IOB.pdf)

The person in charge of the crew on shift in MCC.

In UNIX, environment variables are accessible to programs that you run as well as to the shell from which you work. By convention, their names are all upper case. Environment variables may be set and unset directly by the user at the prompt, or through scripts, applications, and so forth.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/unix/unix.html)

In the context of the database, an event is a heirarchy of all the stages in its processing. It is represented by an event header which contains references to the multiple child objects, each corresponding to a particular stage in the processing.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/objectivity1/objectivity1.html)

Event shape variables are used to separate mostly isotropic B-B(bar) events from jet-like q-q(bar) events. An introduction to the subject can be found in the BaBar Physics Book, Section 4.9, p.181

Reference Link (http://www.slac.stanford.edu/cgi-wrap/getdoc/babar504-004.pdf)

The Event Store manages and tracks the experimental data from the initial raw data produced either by experiment or simulation through various reconstruction and physics analysis processing phases. It also provides a mechanism for creating specific sets of events.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/objectivity1/objectivity1.html)

EvtGen is a generator of Upsilon(4S)and qqbar events.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/gen/gen.html#xx)

Refering to fully reconstructed decays of a specific type. To be contrasted with inclusive, which refers to classes of fully or partially reconstructed decays.

As defined in the BABAR Collaboration Governance Rules: "The Executive Board is responsible for advising the Spokesperson on all scientific financial and organization matters pertaining to the Collaboration." Membership includes one elected representative each from Canada, France, Italy, Germany. There are five US representatives to the Executive Board, one from SLAC, one From LBNL, and three from the universities and LLNL. The Spokesperson and Technical Coordinator are ex-officio members of the Executive Board. The current membership is listed at:

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Organization/ExecBd/)

A group which supports experimenters at SLAC. It is part of the Research Division. The cryogenics group is part of EFD.

This is the basic binary format for BaBar raw data. It provides a compromise between standard C++ object semantics and a more traditional "pointer-and-length" C-style way of working with bulk binary data. An XTC object is basically a variable-length piece of data with a header that specifies its type and size. The term "XTC" is used in two ways in BaBar. It can be used to refer to a single increment of raw data or its data type: e.g., "the XTC from the GLT ROM", or "the SVT XTC format". I

A machine-independent data representation is achieved through a set of translations based on the eXternal Data Representation, (XDR), Networking package. This file output format, xdr files, are the standard output of bbsim.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/xdr/xdr.html)

To add an entry to the Glossary use the BaBar Glossary Submission Form.

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Last significant update: 10-Sept-2002