Distribution of valence quarks and light-cone QCD sum rules

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.1481· OSTI ID:527114

Belyaev, V M ^[1]; Johnson, M B ^[2]

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1. SPhT, CEA-Saclay, 91191 Gif-sur-Yvette, Cedex (France)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

A method for calculating the pion structure function directly in terms of light-cone wave functions is suggested. Taking twist-two and twist-four pion light-cone wave functions into account, it is shown that the QCD sum rule prediction is in agreement with the quark distribution obtained from an analysis of the Drell-Yan process. Twist-four quark-gluon light-cone wave functions give a large positive contribution to the pion structure function for x{sub B}{lt}0.2. A new constraint on the twist-two pion light-cone wave function is obtained. We argue that the leading twist pion wave function {var_phi}{sub {pi}}(u){approx_equal}1 for u=0.3 with an accuracy of about 20{endash}30{percent}. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Los Alamos National Laboratory
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 527114
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
GLUONS
LIGHT CONE
PIONS
QUANTUM CHROMODYNAMICS
QUARKS
STRUCTURE FUNCTIONS
SUM RULES
WAVE FUNCTIONS