Measurement of the σ- charge radius by σ--electron elastic scattering

Academic Article


  • The σ- mean squared charge radius has been measured in the space-like Q2 range 0.035-0.105 GeV2/c2 by elastic scattering of a σ- beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain (rch2σ- = (0.61 ± 0.12(stat.) ± 0.09(syst.)) fm2. The proton and π- charge radii were measured as well and are consistent with results of other experiments. Our result agrees with the recently measured strong interaction radius of the σ-. © 2001 Elsevier Science B.V. All rights reserved.
  • Digital Object Identifier (doi)

    Author List

  • Eschrich I; Krüger H; Simon J; Vorwalter K; Alkhazov G; Atamantchouk AG; Balatz MY; Bondar NF; Cooper PS; Dauwe LJ
  • Start Page

  • 233
  • End Page

  • 239
  • Volume

  • 522
  • Issue

  • 3-4