Production of Lepton Pairs at the LBL Bevalac

  • G. Roche
Part of the NATO ASI Series book series (NSSB, volume 216a)


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 1-2 A GeV are presented. The observation of a structure at about twice the pion mass in the e + e - 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.


Nuclear Matter Pion Mass Inverse Slope Cherenkov Counter Dalitz Decay 
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Copyright information

© Springer Science+Business Media New York 1989

Authors and Affiliations

  • G. Roche
    • 1
  1. 1.Nuclear Science DivisionLawrence Berkeley LaboratoryBerkeleyUSA

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