Division of Electronics, Detectors and Computing for Physics (DEDIP)

Investigation means

High luminosity electron-positron asymmetric (with an electron beam of 9 GeV and a positron beam of 3.1 GeV) collider PEP-II.
 

Particle physics detector BABAR.

Computing : codes for data reconstruction, simulation, and data analysis. 

Technical description

The BABAR detector was composed of five sub-detectors:
- silicon vertex detector;
- chamber for the detection of charged particles;
- Cerenkov effect detector for particle identification;
- electromagnetic calorimeter to mesure neutral particles;
- external detector for muons.
It had also a supraconductor solenoid. 

Specificities

 The study of CP violation in the B Meson system was possible as the collider:

• had a very high luminosity, allowing studying very rare decay modes,
• was asymmetric in energy, enabling separating the decay vertices of the two B mesons.

The particle identification detector was an innovative Cerenkov effect detector (DIRC) using the Cerenkov light reflected inside the radiator.