Production of lepton pairs at the LBL Bevelac

Conference · Thu Jun 01 00:00:00 EDT 1989

OSTI ID:5891029

Roche, G

We discuss the physics objectives for 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 1-2 A GeV are presented. The observation of a structure at about 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 a significant dielectron source above 2 GeV. The dielectron mass spectrum from Ca-Ca at 1 A GeV exhibits an inverse slope larger than the one from p-Be at the same beam energy. 22 refs., 12 figs., 3 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5891029
• Report Number(s): LBL-27411; CONF-8905143-5; ON: DE89015234
• Resource Relation: Conference: NATO international advanced courses on the nuclear equation of state, Peniscola, Spain, 12 May - 3 Jun 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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LEPTONS
PAIR PRODUCTION
BEVALAC
CROSS SECTIONS
MASS SPECTRA
NUCLEAR MATTER
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QUARK-GLUON INTERACTIONS
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ELEMENTARY PARTICLES
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HADRON REACTIONS
HADRONS
HEAVY ION REACTIONS
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MATTER
MESONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
SPECTRA
TARGETS
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