The constraints on the non-singlet polarised parton densities from the infrared-renormalon model

Details The constraints on the non-singlet polarised parton densities from the infrared-renormalon model The constraints on the non-singlet polarised parton densities from the infrared-renormalon model

2003-02-13

arxiv.org/abs/hep-ph/0302101v2

JETP Lett. 77 (2003) 458-460; Pisma Zh.Eksp.Teor.Fiz. 77 (2003) 552-554

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 7 pages, 1 figure; The consideration is revised in case of multiplicatively defined twist-4 terms. Stronger constraints

Scientific paper

10.1134/1.1591968

Using the infrared-renormalon approach, we obtain the constraints on the next-to-leading order non-singlet polarised parton densities. The advocated feature follows from the consideration of the effect revealed in the process of the next-to-leading order fits to the data for the assymetry of polarised lepton-nucleon scattering which result in the approximate nullification of the $1/Q^2$-correction to A_1^N(x,Q^2).

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