U.S. Department of EnergyOffice of Scientific and Technical Information
Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV
Abstract
An experiment that measured the parity violating (PV) asymmetry Ad in e-2H deep inelastic scattering (DIS) at Q2 ~ 1.10 and 1.90 (GeV/c)2 and xB ~ 0.3 was completed in experimental Hall A at the Thomas Jefferson National Accelerator Facility. The asymmetry can be used to extract the neutral weak coupling combination (2C2u-C2d), providing a factor of five to six improvement over the current world data. To achieve this precision, asymmetries of the 10-4 level needed to be measured at event rates up to 500 kHz with high electron detection efficiency and high pion background rejection capability. A specialized scaler-based counting data acquisition system (DAQ) with hardware-based particle identification was successfully implemented. The statistical quality of the asymmetry measurement agreed with the Gaussian distribution to over five orders of magnitudes and the experimental goal of 3-4% statistical uncertainty was achieved. The design and performance of the new DAQ system is presented with the preliminary asymmetry results given in the end.
- Authors:
-
- Massachusetts Institute of Technology, Cambridge, MA (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1133074
- Report Number(s):
- JLAB-PHY-13-1850; DOE/OR/23177-3084
TRN: US1400440
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Thesis/Dissertation
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Pan, Kai. Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV. United States: N. p., 2013.
Web. doi:10.2172/1133074.
Pan, Kai. Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV. United States. https://doi.org/10.2172/1133074
Pan, Kai. 2013.
"Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV". United States. https://doi.org/10.2172/1133074. https://www.osti.gov/servlets/purl/1133074.
@article{osti_1133074,
title = {Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV},
author = {Pan, Kai},
abstractNote = {An experiment that measured the parity violating (PV) asymmetry Ad in e-2H deep inelastic scattering (DIS) at Q2 ~ 1.10 and 1.90 (GeV/c)2 and xB ~ 0.3 was completed in experimental Hall A at the Thomas Jefferson National Accelerator Facility. The asymmetry can be used to extract the neutral weak coupling combination (2C2u-C2d), providing a factor of five to six improvement over the current world data. To achieve this precision, asymmetries of the 10-4 level needed to be measured at event rates up to 500 kHz with high electron detection efficiency and high pion background rejection capability. A specialized scaler-based counting data acquisition system (DAQ) with hardware-based particle identification was successfully implemented. The statistical quality of the asymmetry measurement agreed with the Gaussian distribution to over five orders of magnitudes and the experimental goal of 3-4% statistical uncertainty was achieved. The design and performance of the new DAQ system is presented with the preliminary asymmetry results given in the end.},
doi = {10.2172/1133074},
url = {https://www.osti.gov/biblio/1133074},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {2}
}