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- W2076039063 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." @default.
- W2076039063 created "2016-06-24" @default.
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- W2076039063 date "2014-10-01" @default.
- W2076039063 modified "2023-10-17" @default.
- W2076039063 title "Basic features of the pion valence-quark distribution function" @default.
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- W2076039063 doi "https://doi.org/10.1016/j.physletb.2014.08.009" @default.
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