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Title: Parity Violating Deep Inelastic Electron Scattering from the Deuteron at 6 GeV

Abstract

An experiment that measured the parity violating (PV) asymmetry A d in e- 2H deep inelastic scattering (DIS) at Q 2 ~ 1.10 and 1.90 (GeV/c) 2 and x B ~ 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 (2C 2u-C 2d), 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:
 [1]
  1. 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) (SC-26)
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. Fri . "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}
}

Thesis/Dissertation:
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