APS » PROLA » Phys. Rev. C » Volume 57 » Issue 4

Phys. Rev. C 57, 1865 - 1878 (1998)

Inclusive dielectron cross sections in p+p and p+d interactions at beam energies from 1.04 to 4.88 GeV
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W. K. Wilson et al. (The DLS Collaboration)
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Received 1 August 1997

Measurements of dielectron production in p+p and p+d collisions with beam kinetic energies from 1.04 to 4.88 GeV are presented. The differential cross section is presented as a function of invariant pair mass, transverse momentum, and rapidity. The shapes of the mass spectra and their evolution with beam energy provide information about the relative importance of the various dielectron production mechanisms in this energy regime. The p+d to p+p ratio of the dielectron yield is also presented as a function of invariant pair mass, transverse momentum, and rapidity. The shapes of the transverse momentum and rapidity spectra from the p+d and p+p systems are found to be similar to one another for each of the beam energies studied. The beam energy dependence of the integrated cross sections is also presented.


©1998 The American Physical Society

URL: http://link.aps.org/abstract/PRC/v57/p1865
DOI: 10.1103/PhysRevC.57.1865
PACS: 25.75.-q, 13.75.Cs, 25.40.Ve

* Present address: Physics Dept., North Carolina Agricultural and Technical State University, Greensboro, NC 27411.
† Present address: Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720.
‡ Present address: Max-Planck-Institut für Physik, München, Germany.
§ Present address: Brookhaven National Laboratory, Upton, NY 11973.
** Present address: Physics Dept., University of California, Los Angeles, CA 90024.
†† Present address: Université de Paris VI et VII, LPNHE 75252 Paris Cedex 05, France.
‡‡ Present address: Physics Dept., Michigan State University, East Lansing, MI 48824.
Present address: JPL, Pasadena, CA 91109.
a Present address: Physics Dept., University of Michigan, Ann Arbor, MI 48109.
b Present address: Physics Division, CEBAF, Newport News, VA 23606.

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