ANOMALOUS EVOLUTION OF NONSINGLET NUCLEON STRUCTURE FUNCTIONS

Citation
Rd. Ball et al., ANOMALOUS EVOLUTION OF NONSINGLET NUCLEON STRUCTURE FUNCTIONS, Physics letters. Section B, 329(4), 1994, pp. 505-513
Citations number
33
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
329
Issue
4
Year of publication
1994
Pages
505 - 513
Database
ISI
SICI code
0370-2693(1994)329:4<505:AEONNS>2.0.ZU;2-B
Abstract
We calculate the scale dependence of nonsinglet nucleon structure, fun ctions. Due to anomalous axial symmetry breaking a large flavour asymm etry of the quark-antiquark sea is generated nonperturbatively. This p roduces a strong scale dependence of the nonsinglet structure function in an intermediate range of Q2 . Evolving nonperturbatively a pure va lence distribution from an infrared scale we can thus compute F2p - F2 n as measured by the NMC, and give detailed predictions for its Q2 dep endence at fixed x. We also compare our results with Drell-Yan data.