@article{10272/18417,
year = {2014},
month = {8},
url = {http://hdl.handle.net/10272/18417},
abstract = {The impulse-approximation expression used hitherto to define the pion’s valence-quark distribution
function is flawed because it omits contributions from the gluons which bind quarks into the pion.
A corrected leading-order expression produces the model-independent result that quarks dressed via
the rainbow–ladder truncation, or any practical analogue, carry all the pion’s light-front momentum at
a characteristic hadronic scale. Corrections to the leading contribution may be divided into two classes,
responsible for shifting dressed-quark momentum into glue and sea-quarks. Working with available
empirical information, we use an algebraic model to express the principal impact of both classes of
corrections. This enables a realistic comparison with experiment that allows us to highlight the basic
features of the pion’s measurable valence-quark distribution, qπ (x); namely, at a characteristic hadronic
scale, qπ (x) ∼ (1 − x)2 for x  0.85; and the valence-quarks carry approximately two-thirds of the pion’s
light-front momentum.},
publisher = {Elsevier},
title = {Basic features of the pion valence-quark distribution function},
doi = {10.1016/j.physletb.2014.08.009},
author = {Chang, L. and Mezrag, Cédric and Moutarde, Hervé and Roberts, Craig D. and Rodríguez Quintero, José and Tandy, Peter},
}