Direct measurement of the pion valence-quark momentum distribution, the pion light-cone wave function squared

Citation
Em. Aitala et al., Direct measurement of the pion valence-quark momentum distribution, the pion light-cone wave function squared, PHYS REV L, 86(21), 2001, pp. 4768-4772
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
21
Year of publication
2001
Pages
4768 - 4772
Database
ISI
SICI code
0031-9007(20010521)86:21<4768:DMOTPV>2.0.ZU;2-H
Abstract
We present the first direct measurements of the pion valence-quark momentum distribution which is related to the square of the pion light-cone wave fu nction. The measurements were carried out using data on diffractive dissoci ation of 500 GeV/c pi (-) into dijets from a platinum target at Fermilab ex periment E791. The results show that the /q (q) over bar > light-cone asymp totic wave function describes tile data well for Q(2) similar to 10 (GeV/c) (2) or more. We also measured the transverse momentum distribution of the d iffractive dijets.