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Title: Experimental study of isovector spin sum rules

Abstract

We present the Bjorken integral extracted from Jefferson Lab experiment EG1b for $0.05<2.92$ GeV$^2$. The integral is fit to extract the twist-4 element $$f_{2}^{p-n}$$ which is large and negative. Systematic studies of this higher twist analysis establish its legitimacy at $$Q^{2}$$ around 1 GeV$$^{2}$$. We also extracted the isovector part of the generalized forward spin polarizability $$\gamma_{0}$$. Although this quantity provides a robust test of Chiral Perturbation Theory, our data disagree with the calculations.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
922962
Report Number(s):
JLAB-PHY-08-775; DOE/OR/23177-0297
TRN: US0801830
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ISOVECTORS; PERTURBATION THEORY; POLARIZABILITY; SPIN; SUM RULES; CHIRALITY

Citation Formats

Alexandre Deur, Peter Bosted, Volker Burkert, Donald Crabb, Kahanawita Dharmawardane, Gail Dodge, Tony Forest, Keith Griffioen, Sebastian Kuhn, Ralph Minehart, and Yelena Prok. Experimental study of isovector spin sum rules. United States: N. p., 2008. Web.
Alexandre Deur, Peter Bosted, Volker Burkert, Donald Crabb, Kahanawita Dharmawardane, Gail Dodge, Tony Forest, Keith Griffioen, Sebastian Kuhn, Ralph Minehart, & Yelena Prok. Experimental study of isovector spin sum rules. United States.
Alexandre Deur, Peter Bosted, Volker Burkert, Donald Crabb, Kahanawita Dharmawardane, Gail Dodge, Tony Forest, Keith Griffioen, Sebastian Kuhn, Ralph Minehart, and Yelena Prok. Mon . "Experimental study of isovector spin sum rules". United States. https://www.osti.gov/servlets/purl/922962.
@article{osti_922962,
title = {Experimental study of isovector spin sum rules},
author = {Alexandre Deur and Peter Bosted and Volker Burkert and Donald Crabb and Kahanawita Dharmawardane and Gail Dodge and Tony Forest and Keith Griffioen and Sebastian Kuhn and Ralph Minehart and Yelena Prok},
abstractNote = {We present the Bjorken integral extracted from Jefferson Lab experiment EG1b for $0.05<2.92$ GeV$^2$. The integral is fit to extract the twist-4 element $f_{2}^{p-n}$ which is large and negative. Systematic studies of this higher twist analysis establish its legitimacy at $Q^{2}$ around 1 GeV$^{2}$. We also extracted the isovector part of the generalized forward spin polarizability $\gamma_{0}$. Although this quantity provides a robust test of Chiral Perturbation Theory, our data disagree with the calculations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {2}
}