Measurement of the π− form factor

E. B. Dally, D. J. Drickey, J. M. Hauptman, C. F. May, D. H. Stork, J. A. Poirier, C. A. Rey, R. J. Wojslaw, P. F. Shepard, A. J. Lennox, J. C. Tompkins, T. E. Toohig, A. A. Wehmann, I. X. Ioan, T. S. Nigmanov, E. N. Tsyganov, and A. S. Vodopianov
Phys. Rev. D 24, 1718 – Published 1 October 1981
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Abstract

An experiment to measure the electromagnetic form factor of the negative π meson has been carried out at Fermilab by elastically scattering 100-GeV/c pions from the atomic electrons in a liquid-hydrogen target. We find that the elastic differential scattering cross section is characterized by a root-mean-square pion charge radius of 0.56±0.04 fm. This paper described our experimental design, measurement resolutions, event triggering logic, event reconstruction, experimental corrections, and form-factor results.

  • Received 10 January 1980

DOI:https://doi.org/10.1103/PhysRevD.24.1718

©1981 American Physical Society

Authors & Affiliations

E. B. Dally*, D. J. Drickey†, J. M. Hauptman, C. F. May‡, and D. H. Stork

  • Physics Department, University of California at Los Angeles, Los Angeles, California 90024

J. A. Poirier, C. A. Rey§, and R. J. Wojslaw∥

  • Physics Department, University of Notre Dame, Notre Dame, Indiana 46556

P. F. Shepard

  • Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260

A. J. Lennox, J. C. Tompkins**, T. E. Toohig, and A. A. Wehmann

  • Fermi National Accelerator Laboratory, Batavia, Illinois 60510

I. X. Ioan††, T. S. Nigmanov, E. N. Tsyganov, and A. S. Vodopianov

  • Joint Institute for Nuclear Research, Dubna, U.S.S.R.

  • *Now at Varian Associates, Hansen Way, Palo Alto, CA 94306.
  • †Deceased.
  • ‡Now at Physics Department, Johns Hopkins University, Baltimore, MD 21218.
  • §Now at Interand Corp., 450 E. Ohio, Chicago, IL 60611.
  • ∥Now at the Physics Department, University of California at Riverside, CA 92502.
  • Now at North Central College, Naperville, IL 60540.
  • **Now at High Energy Physics Laboratory, Stanford University, Stanford, CA 94305.
  • ††Now at the Institute of Atomic Physics, Bucharest, Romania.

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Vol. 24, Iss. 7 — 1 October 1981

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