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Title: Dielectron production in p+Be and Ca+Ca collisions at the Bevalac

Abstract

We discuss the physics objectives of the DLS program with some emphasis on the possible use of dileptons as a probe of pion dynamics in nuclear matter. Data on p + Be reactions at 1-5 GeV and Ca + Ca at 1 GeV/A are presented. The observation of a structure at twice the pion mass in the e/sup +/e/sup /minus// invariant mass spectra above 2 GeV beam energy and the excitation function for the p + Be reaction suggest that pion annihilation is the main dielectron source above 2 GeV. The dielectron mass spectrum from Ca + Ca at 1 GeV/A exhibits an inverse slope larger than the one from p + Be at the same beam energy. 14 refs., 9 figs., 1 tab.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
6206141
Report Number(s):
LBL-26460; CONF-8811171-2
ON: DE89007491
DOE Contract Number:  
AC03-76SF00098; FG02-88ER40413; FG03-88ER40424; FG05-88ER40445
Resource Type:
Conference
Resource Relation:
Conference: 17. INS international symposium on nuclear physics at intermediate energies, Tokyo, Japan, 15 Nov 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BERYLLIUM 9 TARGET; PROTON REACTIONS; CALCIUM 40 TARGET; CALCIUM 40 REACTIONS; ELECTRONS; PAIR PRODUCTION; CROSS SECTIONS; ELECTRON SPECTROMETERS; MUON PAIRS; NUCLEAR MATTER; BARYON REACTIONS; CHARGED-PARTICLE REACTIONS; ELEMENTARY PARTICLES; FERMIONS; HADRON REACTIONS; HEAVY ION REACTIONS; INTERACTIONS; LEPTONS; MATTER; MEASURING INSTRUMENTS; NUCLEAR REACTIONS; NUCLEON REACTIONS; SPECTROMETERS; TARGETS; 651320* - Nuclear Properties & Reactions, A=6-19, Experimental; 651520 - Nuclear Properties & Reactions, A=39-58, Experimental; 645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Roche, G. Dielectron production in p+Be and Ca+Ca collisions at the Bevalac. United States: N. p., 1988. Web.
Roche, G. Dielectron production in p+Be and Ca+Ca collisions at the Bevalac. United States.
Roche, G. 1988. "Dielectron production in p+Be and Ca+Ca collisions at the Bevalac". United States. https://www.osti.gov/servlets/purl/6206141.
@article{osti_6206141,
title = {Dielectron production in p+Be and Ca+Ca collisions at the Bevalac},
author = {Roche, G},
abstractNote = {We discuss the physics objectives of the DLS program with some emphasis on the possible use of dileptons as a probe of pion dynamics in nuclear matter. Data on p + Be reactions at 1-5 GeV and Ca + Ca at 1 GeV/A are presented. The observation of a structure at twice the pion mass in the e/sup +/e/sup /minus// invariant mass spectra above 2 GeV beam energy and the excitation function for the p + Be reaction suggest that pion annihilation is the main dielectron source above 2 GeV. The dielectron mass spectrum from Ca + Ca at 1 GeV/A exhibits an inverse slope larger than the one from p + Be at the same beam energy. 14 refs., 9 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/6206141}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {12}
}

Conference:
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