Dilepton production from p-p to Ca-Ca at the Bevalac
H. S. Matis, S. Beedoe, M. Bougteb, J. Carroll, W. Christie, W. Gong, T. Hallman, L. Heilbronn, H. Huang, P. N. Kirk, G. Krebs, G. Igo, A. Letessier-Selvon L. Madansky, F. Manso, J. Miller, C. Naudet, R. J. Porter, M. Prunet, G. Roche, L. S. Schroeder, P. Seidl, Z. F. Wang, R. Welsh, W. K. Wilson, A. Yegneswaran
Abstract
The DLS collaboration has recently completed a high statistics study of dilepton production at the Bevalac. In particular, we have measured dielectrons (e+e-) from p-p and p-d collisions to understand the basic dilepton production mechanisms in the energy range from 1.05 - 4.9 GeV. These data can be used to determine the basic processes which contribute to nucleon-nucleon dilepton production such as hadronic bremsstrahlung, vector meson processes, and hadronic Dalitz decay. The data show that a simple elastic bremsstrahlung calculation is insufficient to explain the data. Theoretical models are compared with the data. A new high statistics study of Ca-Ca at 1.05 A GeV has been made to study the collectivity of A-A collisions.
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