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

Authors
Aitala, EM Amato, S Anjos, JC Appel, JA Ashery, D Banerjee, S Bediaga, I Blaylock, G Bracker, SB Burchat, PR Burnstein, RA Carter, T Carvalho, HS Copty, NK Cremaldi, LM Darling, C Denisenko, K Deval, S Fernandez, A Fox, GF Gagnon, P Gerzon, S Gobel, C Gounder, K Halling, AM Herrera, G Hurvits, G James, C Kasper, PA Kwan, S Langs, DC Leslie, J Lichtenstadt, J Lundberg, B MayTal-Beck, S Meadows, B Neto, JRTD Mihalcea, D Milburn, RH de Miranda, JM Napier, A Nguyen, A d'Oliveira, AB O'Shaughnessy, K Peng, KC Milburn, RH de Miranda, JM Napier, A Nguyen, A d'Oliveira, AB O'Shaughnessy, K Peng, KC Perera, LP Purohit, MV Quinn, B Radeztsky, S Rafatian, A Reay, NW Reidy, JJ dos Reis, AC Rubin, HA Sanders, DA Santha, AKS Santoro, AFS Schwartz, AJ Sheaff, M Sidwell, RA Slaughter, AJ Sokoloff, MD Solano, J Stanton, NR Stefanski, RJ Stenson, K Summers, DJ Takach, S Thorne, K Tripathi, AK Watanabe, S Weiss-Babai, R Wiener, J Witchey, N Wolin, E Yang, SM Yi, D Yoshida, S Zaliznyak, R Zhang, C
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
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → 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.