Dielectron measurements in p+p and p+d interactions from E{sub beam} = 1.0 to 4.9 GeV
The first measurements of dielectron production in p+p and p+d interactions at incident kinetic energies from 1.0--4.9 GeV are summarized. The dielectron yield at 4.9 GeV is found to be in excess of that expected from hadronic decays. The beam energy and invariant mass dependence of the dielectron yield in p+d interactions relative to the yield in p+p interactions are also presented. The ratio of the yield in p+d to that in p+p interactions decreases from nearly 9 at 1.0 GeV to {approx} 2 at 4.9 GeV. The large ratio at 1.0 GeV suggests that dielectron production in the p+d system is dominated by a p+n process. The beam energy dependence of the ratio indicates that this p+n contribution decreases with respect to the other dielectron sources as the incident energy is increased.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098; FG03-88ER40424; FG02-88ER40413; FG05-88ER40445
- OSTI ID:
- 10182962
- Report Number(s):
- LBL-34337; CONF-930197-6; ON: DE93040293; TRN: 93:021745
- Resource Relation:
- Conference: 9. winter workshop on nuclear dynamics,Key West, FL (United States),30 Jan - 6 Feb 1993; Other Information: PBD: Feb 1993
- Country of Publication:
- United States
- Language:
- English
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