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25 April 2024

» pubmed » pmid11384344

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Direct measurement of the pion valence-quark momentum distribution, the pion light-cone wave function squared
E M Aitala ; S Amato ; J C Anjos ; J A Appel ; D Ashery ; S Banerjee ; I Bediaga ; G Blaylock ; S B Bracker ; P R Burchat ; R A Burnstein ; T Carter ; H S Carvalho ; N K Copty ; L M Cremaldi ; C Darling ; K Denisenko ; S Deval ; A Fernandez ; G F Fox ; P Gagnon ; S Gerzon ; C Gobel ; K Gounder ; A M Halling ; G Herrera ; G Hurvits ; C James ; P A Kasper ; S Kwan ; D C Langs ; J Leslie ; J Lichtenstadt ; B Lundberg ; S MayTal-Beck ; B Meadows ; J R de Mello Neto ; D Mihalcea ; R H Milburn ; J M de Miranda ; A Napier ; A Nguyen ; A B d’Oliveira ; K O’Shaughnessy ; K C Peng ; L P Perera ; M V Purohit ; B Quinn ; S Radeztsky ; A Rafatian ; N W Reay ; J J Reidy ; A C dos Reis ; H A Rubin ; D A Sanders ; A K Santha ; A F Santoro ; A J Schwartz ; M Sheaff ; R A Sidwell ; A J Slaughter ; M D Sokoloff ; J Solano ; N R Stanton ; R J Stefanski ; K Stenson ; D J Summers ; S Takach ; K Thorne ; A K Tripathi ; S Watanabe ; R Weiss-Babai ; J Wiener ; N Witchey ; E Wolin ; S M Yang ; D Yi ; S Yoshida ; R Zaliznyak ; C Zhang ;
Date:	21 May 2001
Journal:	Phys Rev Lett, 86 (21), 4768-72
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 function. The measurements were carried out using data on diffractive dissociation of 500 GeV/c pi(-) into dijets from a platinum target at Fermilab experiment E791. The results show that the /q&q> light-cone asymptotic wave function describes the data well for Q2 approximately 10 (GeV/c)(2) or more. We also measured the transverse momentum distribution of the diffractive dijets.
Source:	PubMed, pmid11384344
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