THE FORM FACTOR OF THE NEUTRAL PION,

Abstract

In an experiment performed at Columbia University's Nevis Cyclotron, the decay 'neutral-pion to gamma photon + electron + positron' was observed. Using a system of counters and spark chambers 2200 events were recorded with an opening angle of the Dalitz pair near 120 deg. The effect of pi-zero structure on the invariant mass spectrum of the pair is interpreted as an electromagnetic form factor for the neutral-pion. The form factor is a linear function, (gamma)(x) = 1 + ax, of the invariant mass squared, x. The experimental result for the form factor slope is a = (+0.01 plus or minus 0.11) (1/(pion mass)sq.).

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0666979

Entities

People

  • Peter Nemethy

Organizations

  • Columbia University

Tags

DTIC Thesaurus Topics

  • Chambers
  • Charged Particles
  • Cyclotrons
  • Diffraction
  • Electrons
  • Elementary Fermions
  • Elementary Particles
  • Fermions
  • Mass Spectra
  • Particle Spectra
  • Positrons
  • Spark Chambers
  • Spectra
  • Subatomic Particles

Fields of Study

  • Physics

Readers

  • Solar Physics

Technology Areas

  • Microelectronics