Parton Distributions Functions of Pion, Kaon and Eta pseudoscalar mesons in the NJL model

Details Parton Distributions Functions of Pion, Kaon and Eta pseudoscalar mesons in the NJL model Parton Distributions Functions of Pion, Kaon and Eta pseudoscalar mesons in the NJL model

2001-10-23

arxiv.org/abs/hep-ph/0110291v1

Acta Phys.Polon. B33 (2002) 1791-1808

Physics

High Energy Physics

High Energy Physics - Phenomenology

(Latex, epsfig) 17 pages, 7 figures

Scientific paper

Parton distributions of pseudoscalar pi,K and eta mesons obtained within the NJL model using the Pauli-Villars regularization method are analyzed in terms of LO and NLO evolution, and the valence sea quark and gluon parton distributions for the pion are obtained at Q^2 = 4 GeV^2 and compared to existing parametrizations at that scale. Surprisingly, the NLO order effects turn out to be small compared to the LO ones. The valence distributions are in good agreement with experimental analyses, but the gluon and sea distributions come out to be softer in the high-x region and harder in the low-x region than the experimental analyses suggest.

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