Rare B meson decays - mathieu trocmé

II- Physical Background 13
BABAR is also the name of the detector that has primarily been built to study CP violation
in B meson decays. However, comprising all the elements of a general purpose detector,
namely :
- a high resolution silicon vertex tracker,
- a drift chamber for general tracking and momentum measurement,
- a Čerenkov detector to distinguish particles,
- an electromagnetic calorimeter enclosed in a 1.5 T solenoid to measure
photons and electrons energy
- a kind of hadronic calorimeter to detect muons and neutral kaons
it can be used for many other tasks and is so an excellent opportunity to look at many parts of
the Standard Model.
Čerenkov Detector
Tracking Chamber
Muon/Hadron Detector
Silicon
Vertex Detector
Figure 5: Schematic diagram of the BABAR detector
Magnet Coil
EM calorimeter
(Electron/Photon Detector)