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

E M Aitala,D C Langs,B Lundberg,S B Bracker,R J Stefanski,S Yoshida,J Solano,R Weiss-Babai,J M De Miranda,N W Reay,J Lichtenstadt,A Napier,H A Rubin,D A Sanders,C Zhang,P Gagnon,R A Burnstein,L P Perera,J R T De Mello Neto,P A Kasper,G F Fox,A Nguyen,M D Sokoloff,K Stenson,G Blaylock,A C Dos Reis,P R Burchat,K Gounder,A Rafatian,K Denisenko,S Radeztsky,D J Summers,M Sheaff,A J Slaughter,G Hurvits,S Takach,S Deval,C James,R A Sidwell,S Amato,G Herrera,N Witchey,J C Anjos,I Bediaga,C Darling,D Mihalcea,J Wiener,S Kwan,B Quinn,B Meadows,R Zaliznyak,D Ashery,S Banerjee,N R Stanton,A M Halling,A F S Santoro,R H Milburn,H S Carvalho,E Wolin,J A Appel,A J Schwartz,S.a Gerzon ,K.c Peng ,Yi Duan ,K A Thorne ,A.k.s Santha ,Shuji Watanabe ,A D’oliveira ,S Maytal‐Beck ,Thomas Carter ,J R Leslie ,C Göbel ,M Purohit ,J Reidy ,S Yang ,L Cremaldi ,A Tripathi ,A Fernández ,K O’shaughnessy ,N Copty

doi:10.1103/physrevlett.86.4768

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

E M Aitala, D C Langs + Show 78 more

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https://doi.org/10.1103/physrevlett.86.4768

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Journal: Physical Review Letters	Publication Date: May 21, 2001
Citations: 101

Affiliation: University of South Carolina, Fermilab, Kansas State University, Tel Aviv University, Tufts University, Illinois Institute of Technology, University of Mississippi, University of California, Santa Cruz, University of Cincinnati, University of Massachusetts Amherst, Stanford University, University of Wisconsin–Madison, Yale University, Center for Research and Advanced Studies of the National Polytechnic Institute

#Fermilab Experiment E791 #Platinum Target + Show 8 more

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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.

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