First measurement of π-e→π-eγ pion virtual compton scattering

Academic Article


  • Pion virtual compton scattering (VCS) via the reaction π-e→π-eγ was observed in the Fermilab E781 SELEX experiment. SELEX used a 600 GeV/c π- beam incident on target atomic electrons, detecting the incident π- and the final state π-, electron and γ. Theoretical predictions based on chiral perturbation theory are incorporated into a Monte Carlo simulation of the experiment and are compared to the data. The number of reconstructed events (=9) and their distribution with respect to the kinematic variables (for the kinematic region studied) are in reasonable accord with the predictions. The corresponding π- VCS experimental cross section is σ=38.8±13 nb, in agreement with the theoretical expectation of σ=34.7 nb.
  • Digital Object Identifier (doi)

    Author List

  • Ocherashvili A; Alkhazov G; Atamantchouk AG; Balatz MY; Bondar NF; Cooper PS; Dauwe LJ; Davidenko GV; Dersch U; Dolgolenko AG
  • Start Page

  • 346131
  • End Page

  • 346139
  • Volume

  • 66
  • Issue

  • 3