Parity Violation Inelastic Scattering Experiments at 6 GeV and 12 GeV Jefferson Lab

Conference · Sun Mar 01 04:00:00 EST 2015

DOI:https://doi.org/10.3204/DESY-PROC-2014-04/257· OSTI ID:1222955

Sulkosky, Vincent A. ^[1]; et. al.,

---

1. University of Virginia, Charlottesville, VA; Jefferson Lab, Newport News, VA

We report on the measurement of parity-violating asymmetries in the deep inelastic scattering and nucleon resonance regions using inclusive scattering of longitudinally polarized electrons from an unpolarized deuterium target. The effective weak couplings C$$_{2q}$$ are accessible through the deep-inelastic scattering measurements. Here we report a measurement of the parity-violating asymmetry, which yields a determination of 2C$$_{2u}$$ - C$$_{2d}$$ with an improved precision of a factor of five relative to the previous result. This result indicates evidence with 95% confidence that the 2C$$_{2u}$$ - C$$_{2d}$$ is non-zero. This experiment also provides the first parity-violation data covering the whole resonance region, which provide constraints on nucleon resonance models. Finally, the program to extend these measurements at Jefferson Lab in the 12 GeV era using the Solenoidal Large Intensity Device was also discussed.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• Contributing Organization: JLAB PVDIS and SoLiD Collaborations
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1222955
• Report Number(s): JLAB-PHY-14-1995; DOE/OR/23177-3573; SC0003885; AC02-06CH11357; NSF Grant 0653347; Jeffress Memorial Trust Grant J-836
• Country of Publication: United States
• Language: English