Gluon distributions in nucleons and pions at a low resolution scale - art.no. 014001

Citation
Hr. Christiansen et J. Magnin, Gluon distributions in nucleons and pions at a low resolution scale - art.no. 014001, PHYS REV D, 6301(1), 2001, pp. 4001
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6301
Issue
1
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010101)6301:1<4001:GDINAP>2.0.ZU;2-W
Abstract
In this paper we study the gluon distribution functions in nucleons and pio ns 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 sca les. Here, in the framework of a model recently developed, it is shown that the hypothetical cloud of neutral pions surrounding nucleons and pions app ears to be responsible for the characteristic valence-like gluon distributi ons needed at the inital low scale. As an additional result, we get the rem arkable prediction that neutral and charged pions have different intrinsic sea flavor content.