The G0 experiment: Parity violation in e-N elastic scattering

Conference · Mon Jan 31 23:00:00 EST 2005 · Eur.Phys.J.A

DOI:https://doi.org/10.1140/epjad/s2005-04-013-3· OSTI ID:882893

Roos, Philip G

The G0 experiment will measure the parity-violating asymmetries in elastic electron-nucleon scattering. The experiment is being performed in Hall C at the Jefferson Laboratory using a polarized electron beam and a dedicated experimental setup. Measurements of the electron-proton asymmetries will be made at both forward and backward angles, and electron-deuteron asymmetries at the backward angles. These measurements will cover a momentum transfer range of 0.1 – 1.0 GeV2/c2. From these data the vector neutral weak form factors, GEZ and GMZ, and the effective axial current of the nucleon, GAe, may be extracted. When combined with the known electromagnetic form factors, one will be able to extract the contributions of u, d, and s quarks to the protons charge and magnetization distributions. The first measurements at forward angles for the full momentum transfer range have very recently been successfully completed and preliminary results are presented here.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 882893
• Report Number(s): JLAB-PHY-04-69; DOE/ER/40150-3901
• Journal Information: Eur.Phys.J.A, Journal Name: Eur.Phys.J.A Journal Issue: S2 Vol. 24
• Country of Publication: United States
• Language: English