[High-energy electron-positron interactions]. [The Univ. of Massachusetts at Amherst]
The purpose of the research was the study of electron-positron interactions at high energies using the Time Projection Chamber (TPC) at the Positron Electron Project (PEP) at SLAC. The TPC detector had an initial data gathering from 1982 until 1986 and accumulated a data sample with an integrated luminosity of -150 pb[sup [minus]1] at an electron-positron energy of 29 GeV. The data runs in the 1988--1990 time period (yielding [approximately] pb[sup [minus]1]) were abbreviated, due to the need of the laboratory to give highest priority to the new Stanford Linear Collider (SLC). The TPC collaboration decided in 1991 to discontinue data taking, but has continued the collaboration for the purpose of completing the analysis of the data. When UMass joined the SLD project, it was being designed as a new state-of-the-art detector for studying electron-positron interactions at energies in the vicinity of 91 GeV, the Z[sup 0] mass. The detector was completed and installed at the interaction point of the SLC in 1991, at which time an initial, engineering run'' allowed the debugging of detector components and provided a data sample of [approximately]1,000 events with hadronic Z[sup 0] decays. In 1992 the SLC provided beams of polarized electrons and the SLD collected a data sample in excess of 11,000 hadronic Z[sup 0] events produced by polarized electrons, allowing unique measurements of some of the parameters of the standard model. This project is continuing to take data in 1993 with increased polarization and higher luminosity. This report reviews the research work performed under the contract, and survey's the physics results.
- Research Organization:
- Massachusetts Univ., Amherst, MA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-85ER40194
- OSTI ID:
- 6620954
- Report Number(s):
- DOE/ER/40194-6; ON: DE93011611
- Country of Publication:
- United States
- Language:
- English
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ELECTRON-POSITRON INTERACTIONS
TIME PROJECTION CHAMBERS
STANFORD LINEAR COLLIDER DETECTOR
REVIEWS
DATA ACQUISITION SYSTEMS
PARTICLE TRACKS
PERFORMANCE
PROGRESS REPORT
DOCUMENT TYPES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
PARTICLE INTERACTIONS
440104* - Radiation Instrumentation- High Energy Physics Instrumentation