The neutron charge form factor at low Q2

Ricardo Alarcon, E. Geis, M. Kohl, R. Milner, V. Ziskin

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Measurement of the charge form factor of the neutron GE n presents a sensitive test of nucleon models and QCD-inspired theories. In particular, the pion cloud is expected to play a dominant role in the low-momentum transfer region of GEn. At the MIT-Bates Linear Accelerator Center, GEn has been measured by means of (e,e') quasielastic scattering of polarized electrons from vector-polarized deuterium. The experiment used the longitudinally polarized stored electron beam of the MIT-Bates South Hall Ring along with an isotopically pure, highly vector-polarized internal atomic deuterium target provided by an atomic beam source. The measurements have been carried out with the symmetric Bates Large Acceptance Spectrometer Toroid (BLAST) with enhanced neutron detection capability. From the beam-target double polarization asymmetry with the target spin oriented perpendicular to the momentum transfer the form factor G En is extracted over a range of four-momentum transfer Q2 between 0.12 and 0.70 (GeV/c)2 with minimized model dependencies.

Original languageEnglish (US)
Title of host publicationPARTICLES AND NUCLEI
Subtitle of host publicationSeventeenth Internatinal Conference on Particles and Nuclei
Number of pages3
StatePublished - 2006
EventPARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei - Santa Fe, NM, United States
Duration: Oct 23 2005Oct 30 2005

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherPARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei
Country/TerritoryUnited States
CitySanta Fe, NM


  • Electron scattering
  • Nucleon from factors
  • Polarization

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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