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High Energy Physics - Phenomenology

arXiv:hep-ph/0503140 (hep-ph)
[Submitted on 15 Mar 2005 (v1), last revised 19 May 2005 (this version, v2)]

Title:Role of Positivity Constraints in Determining Polarized Parton Densities

Authors:Elliot Leader, Aleksander V. Sidorov, Dimiter B. Stamenov
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Abstract: We have re-analyzed the world data on inclusive polarized DIS, in both NLO and LO QCD, including the very precise JLab Hall A neutron data, and have studied the role of positivity constraints, and demonstrated their importance, in determining the strange and gluon densities. We have shown that higher twist corrections are essential in the analysis of the present data on the structure function g1. A consistent QCD analysis is achieved, and results for the polarized parton densities are given in both the MSbare and JET schemes.
Comments: 20 pages, 10 figures, 3 tables; minor changes are made in the text, a new figure (Fig. 7) and references added, version accepted for publication in JHEP
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:hep-ph/0503140
  (or arXiv:hep-ph/0503140v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0503140
Journal reference: JHEP 0506:033,2005
Related DOI: https://doi.org/10.1088/1126-6708/2005/06/033

Submission history

From: Dimiter Stamenov [view email]
[v1] Tue, 15 Mar 2005 09:59:31 UTC (466 KB)
[v2] Thu, 19 May 2005 13:57:35 UTC (490 KB)
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