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Production of KL0 Mesons and Neutrons from Electrons on Beryllium Above 10 GeV

G. W. Brandenburg, A. D. Brody, W. B. Johnson, D. W. G. S. Leith, J. S. Loos*, G. J. Luste†, J. A. J. Matthews, K. Moriyasu‡, B. C. Shen§ et al.

W. M. Smart∥, F. C. Winkelmann, and R. J. Yamartino

  • Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305

  • *Now at Duke University, Durham, North Carolina.
  • †Now at the University of Toronto, Toronto, Canada.
  • ‡Now at the University of Washington, Seattle, Washington.
  • §Now at the University of California (Riverside), Riverside, California.
  • ∥Now at the Naitonal Accelerator Laboratory, Batavia, Illinois.
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Phys. Rev. D 7, 708 – Published 1 February, 1973

DOI: https://doi.org/10.1103/PhysRevD.7.708

Abstract

Measurements are presented of the yields of KL0 mesons and neutrons produced by electrons of energies between 10 and 19 GeV incident on 0.70- and 1.75-radiation-length beryllium targets for production angles between 1.6° and 4°. Values for the KL0 absorption cross section on lead are also found for momenta between 1.4 and 7.4 GeV/c. A successful interpretation of KL0 production is made in terms of the process γN→KL0X, where X represents an inclusive sum over all final states. The invariant structure function for KL0 photoproduction, extracted from the Be yields, is found to be simply related to the result for hydrogen by an over-all multiplicative factor, Aeff, the effective number of nucleons in the target nucleus. The results of the theoretical analysis are also compared to charged-K photoproduction and extrapolated to electron energies of 50 GeV.

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Phys. Rev. D 7, 708– Published 1 February, 1973
  • Received 14 August 1972

© 1973 American Physical Society

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