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arXiv · hep-ph/0003088

Gluon distributions in nucleons and pions at a low resolution scale

H. R. Christiansen·J. Magnin
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Abstract

In this paper we study the gluon distribution functions in nucleons and pions at a low resolution $Q^2$ scale. This is an important issue since parton densities at low $Q^2$ have always been taken as an external input which is adjusted through DGLAP evolution to fit the experimental data at higher scales. Here, in the framework of a model recently developed, it is shown that the hypothetical cloud of {\it neutral} pions surrounding nucleons and pions appears to be responsible for the characteristic valence-like gluon distributions needed at the inital low scale. As an additional result, we get the remarkable prediction that neutral and charged pions have different intrinsic sea flavor contents.

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H. R. Christiansen, J. Magnin. 2000-09-16. Gluon distributions in nucleons and pions at a low resolution scale. https://doi.org/10.1103/physrevd.63.014001

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