Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global QCD Analysis of Pion Parton Distributions with Threshold
  Resummation   We perform the first global QCD analysis of pion valence, sea quark, and
gluon distributions within a Bayesian Monte Carlo framework with threshold
resummation on Drell-Yan cross sections at next-to-leading log accuracy.
Exploring various treatments of resummation, we find that the large-$x$
asymptotics of the valence quark distribution $\sim (1-x)^{\beta_v}$ can differ
significantly, with $\beta_v$ ranging from $\approx 1$ to $> 2.5$ at the input
scale. Regardless of the specific implementation, however, the resummation
induced redistribution of the momentum between valence quarks and gluons boosts
the total momentum carried by gluons to $\approx 40\%$, increasing the gluon
contribution to the pion mass to $\approx 40$ MeV.

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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: stat
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an