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Title: Structure Functions at Low Q^2: Target Mass Corrections

Abstract

We discuss recent developments in the study of structure functions at low Q^2, focusing in particular on the issue of target mass corrections (TMC) to nucleon structure functions. We summarize the standard TMC implementation, and contrast this with a new formulation which has the correct kinematic threshold behavior at finite Q^2 in the x -> 1 limit.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
917014
Report Number(s):
JLAB-THY-07-733; DOE/OR/23177-0151
TRN: US0804407
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: NuInt07, 30 May - 3 Jun 2007, Batavia, Illinois
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FOCUSING; IMPLEMENTATION; NUCLEONS; STRUCTURE FUNCTIONS; TARGETS

Citation Formats

Wally Melnitchouk. Structure Functions at Low Q^2: Target Mass Corrections. United States: N. p., 2007. Web.
Wally Melnitchouk. Structure Functions at Low Q^2: Target Mass Corrections. United States.
Wally Melnitchouk. Wed . "Structure Functions at Low Q^2: Target Mass Corrections". United States. doi:. https://www.osti.gov/servlets/purl/917014.
@article{osti_917014,
title = {Structure Functions at Low Q^2: Target Mass Corrections},
author = {Wally Melnitchouk},
abstractNote = {We discuss recent developments in the study of structure functions at low Q^2, focusing in particular on the issue of target mass corrections (TMC) to nucleon structure functions. We summarize the standard TMC implementation, and contrast this with a new formulation which has the correct kinematic threshold behavior at finite Q^2 in the x -> 1 limit.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 30 00:00:00 EDT 2007},
month = {Wed May 30 00:00:00 EDT 2007}
}

Conference:
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  • We discuss recent developments in the study of structure functions at low Q{sup 2}, focusing in particular on the issue of target mass corrections (TMC) to nucleon structure functions. We summarize the standard TMC implementation, and contrast this with a new formulation which has the correct kinematic threshold behavior at finite Q{sup 2} in the x{yields}1 limit.
  • We review the physics of structure functions at low Q{sup 2}, focusing on the phenomenon of quark-hadron duality and the resonance-scaling transition, both phenomenologically and in the context of quark models. We also present a new implementation of target mass corrections to nucleon structure functions which, unlike existing treatments, has the correct kinematic threshold behavior at finite Q{sup 2} in the x -> 1 limit.
  • The recently completed experiment E94-010 at Jefferson Lab studies the neutron spin structure functions at low momentum transfer (Q{sup 2}) values. Using a polarized {sup 3} He target and polarized electron beam, we have measured the asymmetries and cross sections for {sup 3}He(e,e') from the elastic to the deep inelastic region. The covered Q{sup 2} ranges from 0.03 to 1.1 GeV{sup 2}. From the data, the Q{sup 2} evolution of the spin structure functions for {sup 3}He and neutron, and of the Gerasimov-Drell-Hearn (GDH) sum rule has been studied, and the preliminary results are presented.
  • Spin structure functions of the nucleon in the region of large x and small to moderate Q2 continue to be of high current interest. A large experimental program to measure the spin structure function g1 and its first moment Gamma{sub 1} has been concluded at Jefferson Lab. An overview of the experiment and its kinematic coverage will be discussed. We will also show preliminary results from the 5.7 GeV and the 1.6 GeV data sets.