On the Relation Between Mechanisms for Single-Transverse-SpinAsymmetries

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Recent studies have shown that two widely-used mechanismsfor single-transverse-spin asymmetries based on either twist-threecontributions or on transverse-momentum-dependent (Sivers) partondistributions become identical in a kinematical regime of overlap. Thiswas demonstrated for the so-called soft-gluon-pole and hard-polecontributions to the asymmetry associated with a particular quark-gluoncorrelation function in the nucleon. In this paper, using semi-inclusivedeep inelastic scattering as an example, we extend the study to thecontributions by soft-fermion poles and by another independenttwist-three correlation function. We find that these additional termsorganize themselves in such a way as to maintain the mutual consistencyof the two mechanisms for single-spin asymmetries.

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Koike, Yuji; Vogelsang, Werner & Yuan, Feng November 5, 2007.

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Recent studies have shown that two widely-used mechanismsfor single-transverse-spin asymmetries based on either twist-threecontributions or on transverse-momentum-dependent (Sivers) partondistributions become identical in a kinematical regime of overlap. Thiswas demonstrated for the so-called soft-gluon-pole and hard-polecontributions to the asymmetry associated with a particular quark-gluoncorrelation function in the nucleon. In this paper, using semi-inclusivedeep inelastic scattering as an example, we extend the study to thecontributions by soft-fermion poles and by another independenttwist-three correlation function. We find that these additional termsorganize themselves in such a way as to maintain the mutual consistencyof the two mechanisms for single-spin asymmetries.

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  • Journal Name: Physics Letter B; Journal Volume: 659; Journal Issue: 5; Related Information: Journal Publication Date: 02/07/2008

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  • Report No.: LBNL--63572
  • Report No.: BNL-NT-07/46, RBRC-702
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 929055
  • Archival Resource Key: ark:/67531/metadc895390

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  • November 5, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 6, 2016, 2:27 p.m.

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Koike, Yuji; Vogelsang, Werner & Yuan, Feng. On the Relation Between Mechanisms for Single-Transverse-SpinAsymmetries, article, November 5, 2007; United States. (digital.library.unt.edu/ark:/67531/metadc895390/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.