Measurement of Dielectron Production in Ca+Ca
Collisions at 1.05 GeV/nucleon Beam Kinetic Energy
Robert Jefferson Porter, 1995
The work reported in this dissertation covers the measurement
of dielectron production in Ca+Ca collisions at the beam
kinetic energy of 1.05 GeV/nucleon. The experiment was
performed by the Dilepton Spectrometer (DLS) Collaboration
at Lawrence Berkeley LaboratoryÕs Bevalac accelerator. In
order to provide motivation for this measurement, summary
descriptions of the DLS experimental program and some
current physics interpretations of the dielectron production
characteristics are presented. The results from the current
investigation are provided following descriptions of the
spectrometer systems and the analysis processes used to extract
the dielectron cross section. These results include the
determination of the multiplicity dependence in the dielectron
yield and the presentation of the dielectron production differential
cross sections with respect to the variable representation of the
virtual photon; mass, transverse momentum, and laboratory rapidity.
Furthermore, the measured cross section is compared with an earlier
DLS measurement of dielectrons produced in Ca+Ca collisions at this same
beam energy.
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