Chang, L.Mezrag, CédricMoutarde, HervéRoberts, Craig D.Rodríguez Quintero, JoséTandy, Peter2020-07-012020-07-012014-08Chang, L., Mezrag, C., Moutarde, H., Roberts, C. D., Rodríguez Quintero, J., & Tandy, P. C. (2014). Basic features of the pion valence-quark distribution function. Physics Letters B, 737, 23–29. DOI: https://doi.org/10.1016/j.physletb.2014.08.0091873-2445http://hdl.handle.net/10272/18417The 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.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Deep inelastic scatteringDrell–Yan processDynamical chiral symmetry breakingDyson–Schwinger equationsπ-mesonParton distribution functionsjournal article10.1016/j.physletb.2014.08.009open access