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Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
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We determine the valence parton distribution function of the pion by performing a new analysis of data for the Drell-Yan process $\pi^- N\to \mu^+\mu^-X$. Compared to previous analyses, we include next-to-leading-logarithmic threshold resummation effects in the calculation of the Drell-Yan cross section. As a result of these, we find a considerably softer valence distribution at high momentum fractions $x$ than obtained in previous next-to-leading order analyses, in line with expectations based on perturbative-QCD counting rules or Dyson-Schwinger equations.
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Forward citations
Cited by 3 Pith papers
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Pion parton distribution functions and pion-nucleus induced $J/\psi$ production in extended light-front holographic QCD
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