Determination of the effective strong coupling constant αs, g1 (Q2) from CLAS spin structure function data

A. Deur; V. Burkert; J. P. Chen; W. Korsch

doi:10.1016/j.physletb.2008.06.049

Determination of the effective strong coupling constant α_{s, g1} (Q²) from CLAS spin structure function data

A. Deur, V. Burkert, J. P. Chen, W. Korsch

Physics And Astronomy

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107 Scopus citations

Abstract

We present a new extraction of the effective strong coupling constant α_{s, g1} (Q²). The result agrees with a previous determination and extends the measurement of the low and high Q² behavior of α_{s, g1} (Q²) that was previously deduced from sum rules. In particular, it experimentally verifies the lack of Q²-dependence of α_{s, g1} (Q²) in the low Q² limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a parameterization of α_{s, g1} (Q²) that can equivalently be used to parameterize the Q²-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.

Original language	English
Pages (from-to)	349-351
Number of pages	3
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	665
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2008.06.049
State	Published - Jul 31 2008

Bibliographical note

Funding Information:
This work was supported by the US Department of Energy (DOE). The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the DOE under contract DE-AC05-84ER40150.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2008.06.049

Cite this

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title = "Determination of the effective strong coupling constant αs, g1 (Q2) from CLAS spin structure function data",

abstract = "We present a new extraction of the effective strong coupling constant αs, g1 (Q2). The result agrees with a previous determination and extends the measurement of the low and high Q2 behavior of αs, g1 (Q2) that was previously deduced from sum rules. In particular, it experimentally verifies the lack of Q2-dependence of αs, g1 (Q2) in the low Q2 limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a parameterization of αs, g1 (Q2) that can equivalently be used to parameterize the Q2-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.",

author = "A. Deur and V. Burkert and Chen, {J. P.} and W. Korsch",

note = "Funding Information: This work was supported by the US Department of Energy (DOE). The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the DOE under contract DE-AC05-84ER40150.",

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AU - Burkert, V.

AU - Chen, J. P.

AU - Korsch, W.

N1 - Funding Information: This work was supported by the US Department of Energy (DOE). The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the DOE under contract DE-AC05-84ER40150.

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