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Title: Measurement of the generalized forward spin polarizabilities of the neutron

The generalized forward spin polarizabilities {gamma}{sub 0} and {delta}{sub LT} of the neutron have been extracted for the first time in a Q{sup 2} range from 0.1 to 0.9 GeV{sup 2}. Since {gamma}{sub 0} is sensitive to nucleon resonances and {delta}{sub LT} is insensitive to the {Delta} resonance, it is expected that the pair of forward spin polarizabilities should provide benchmark tests of the current understanding of the chiral dynamics of QCD. The new results on {delta}{sub LT} show significant disagreement with Chiral Perturbation Theory calculations, while the data for {gamma}{sub 0} at low Q{sup 2} are in good agreement with a next-to-lead order Relativistic Baryon Chiral Perturbation theory calculation. The data show good agreement with the phenomenological MAID model.
Authors:
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Publication Date:
OSTI Identifier:
824400
Report Number(s):
JLAB-PHY-04-230; DOE/ER/40150-2665
TRN: US0402026
DOE Contract Number:
AC05-84ER40150
Resource Type:
Journal Article
Resource Relation:
Other Information: No journal information given for this preprint; PBD: 1 May 2004
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org:
USDOE Office of Energy Research (ER) (US)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARYONS; BENCHMARKS; ENANTIOMORPHS; NEUTRONS; NUCLEONS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; RESONANCE; SPIN