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Title Measurements of the Double-Spin Asymmetry A1 on Helium-3: Toward a Precise Measurement of the Neutron A1
Abstract The spin structure of protons and neutrons has been an open question for nearly twenty- ve years, after surprising experimental results disproved the simple model in which valence quarks were responsible for nearly 100% of the nucleon spin. Diverse theoretical approaches have been brought to bear on the problem, but a shortage of precise data { especially on neutron spin structure { has prevented a thorough understanding. Experiment E06-014, conducted in Hall A of Je fferson Laboratory in 2009, presented an opportunity to add to the world data set for the neutron in the poorly covered valence-quark region. Je fferson Laboratory's highly polarized electron beam, combined with Hall A's facilities for a high-density, highly polarized 3He target, allowed a high-luminosity double-polarized experiment, while the large acceptance of the BigBite spectrometer gave coverage over a wide kinematic range: 0:15 < x < 0:95. In this work, we present the analysis of a portion of the E06-014 data, mea
Author(s) Diana Parno
Publication Date April 2011
Document Type Thesis
Primary Institution Carnegie Foundation , Princeton, NJ
Affiliation Exp Nuclear Physics / Experimental Halls / Hall A
Funding Source
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-11-1565 OSTI Number: 1133078
LANL Number: Other Number: DOE/ER/40150-4976
Associated with an experiment Yes
Experiment Number(s)
E99-117
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Thesis
Thesis Type PhD
Advisor Institution
1. Gregg Franklin CMU
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