
TL;DR
The BABAR detector was designed for comprehensive CP-violation studies in B-meson decays, featuring advanced tracking, calorimetry, and particle identification systems at the SLAC PEP-II B Factory.
Contribution
This paper details the design, layout, and performance of the BABAR detector components, electronics, and software for studying CP-violation in B-meson decays.
Findings
Successful measurement of charged particle tracks
Effective detection of electromagnetic showers from electrons and photons
Reliable identification of muons and neutral hadrons
Abstract
BABAR, the detector for the SLAC PEP-II asymmetric e+e- B Factory operating at the upsilon 4S resonance, was designed to allow comprehensive studies of CP-violation in B-meson decays. Charged particle tracks are measured in a multi-layer silicon vertex tracker surrounded by a cylindrical wire drift chamber. Electromagentic showers from electrons and photons are detected in an array of CsI crystals located just inside the solenoidal coil of a superconducting magnet. Muons and neutral hadrons are identified by arrays of resistive plate chambers inserted into gaps in the steel flux return of the magnet. Charged hadrons are identified by dE/dx measurements in the tracking detectors and in a ring-imaging Cherenkov detector surrounding the drift chamber. The trigger, data acquisition and data-monitoring systems, VME- and network-based, are controlled by custom-designed online software.…
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