Bose-Einstein correlations of pairs of identical charged pions produced in hadronic Z decays are analyzed in terms of various parametrizations. A good description is achieved using a Lévy stable ...distribution in conjunction with a model where a particle's momentum is correlated with its space-time point of production, the \taumodel. Using this description and the measured rapidity and transverse momentum distributions, the space-time evolution of particle emission in two-jet events is reconstructed. However, the elongation of the particle emission region previously observed is not accommodated in the \taumodel, and this is investigated using an \adhoc/ modification.
A radio-frequency-quadrupole (RFQ) accelerator based calibration system has been installed in the L3 experiment. This system consists of a 30 keV RF-driven volume H— ion source, a 1.85 MeV RFQ ...accelerator, a N
2 gas neutralizer, a 10 m long beam pipe and a Li target. The 17.6 MeV photons produced by radiative capture of 1.85 MeV H
0 atom,
7Li(H,
γ)
8Be, provide a calibration source for 11,000 crystals of the L3 BGO calorimeter.
High resolution crystal calorimetry at LHC
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/1992
Journal Article
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