Moments of the heavy-quark parton distribution function from QCD sum rules

Journal Article · Sun Mar 15 00:00:00 EDT 2009 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778809030090· OSTI ID:21405986

Oganesian, A G ^[1]

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1. Institute of Theoretical and Experimental Physics (Russian Federation)

The moments of the heavy-quark parton distribution functions in a heavy pseudoscalar meson are calculated from QCD sum rules. Expanding these sum rules in the inverse heavy-quark mass we obtain the heavy-mass limits of the moments. Comparison with the finite-mass results reveals that while the heavy-mass expansion works reasonably well for the b quark, one has to take into account terms of higher order than (1/m{sub c}){sup 2} for the c quark. This result can provide a quantitative assessment of c- and b-quark fragmentation models based on the heavy-quark mass limit.

• OSTI ID: 21405986
• Journal Information: Physics of Atomic Nuclei, Vol. 72, Issue 3; Other Information: DOI: 10.1134/S1063778809030090; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
C QUARKS
COMPARATIVE EVALUATIONS
DISTRIBUTION FUNCTIONS
MASS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUARK MODEL
SUM RULES
T QUARKS
BEAUTY PARTICLES
BOSONS
CHARM PARTICLES
COMPOSITE MODELS
ELEMENTARY PARTICLES
EQUATIONS
EVALUATION
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
MATHEMATICAL MODELS
MESONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
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