Global QCD Analysis of Pion Parton Distributions with Threshold Resummation.

@article{Barry2021GlobalQA,
  title={Global QCD Analysis of Pion Parton Distributions with Threshold Resummation.},
  author={Patrick Barry and C-R. Ji and Nobuo Sato and W. Melnitchouk},
  journal={Physical review letters},
  year={2021},
  volume={127 23},
  pages={
          232001
        }
}
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 ∼(1-x)^{β_{v}} can differ significantly, with β_{v} ranging from ≈1 to >2.5 at the input scale. Regardless of the specific implementation, however, the… 

Figures and Tables from this paper

Lattice QCD Determination of the Bjorken-x Dependence of Parton Distribution Functions at Next-to-Next-to-Leading Order.

We report the first lattice QCD calculation of pion valence quark distribution with next-to-next-to-leading order perturbative matching correction, which is done using two fine lattices with spacings

Large-x power laws of parton distributions remain inconclusive

Focusing on hadron scattering at large partonic momentum fractions x, we compare nonperturbative QCD predictions for the asymptotic behavior of DIS structure functions and parton distribution

Emergence of pion parton distributions

Supposing only that there is an effective charge which defines an evolution scheme for parton distribution functions (DFs) that is all-orders exact, strict lower and upper bounds on all Mellin moments

Quark and Gluon Momentum Fractions in the Pion from N_{f}=2+1+1 Lattice QCD.

We perform the first full decomposition of the pion momentum into its gluon and quark contributions. We employ an ensemble generated by the Extended Twisted Mass Collaboration with N_{f}=2+1+1 Wilson

Pion Partonic Distributions in the Statistical Model from Pion-induced Drell-Yan and $J/\Psi$ Production Data

We present a new analysis to extract pion parton distribution functions (PDFs) within the framework of the statistical model. Starting from the statistical model first developed for the spin-1/2

Accessing the Pion 3D Structure at US and China Electron-Ion Colliders.

We present the first systematic feasibility study of accessing generalized parton distributions of the pion at an electron-ion collider through deeply virtual Compton scattering. Relying on

Concerning pion parton distributions

Analyses of the pion valence-quark distribution function (DF), , which explicitly incorporate the behaviour of the pion wave function prescribed by quantum chromodynamics (QCD), predict , $$\beta

Investigating saturation effects and the virtual pion in leading neutron events at HERA with the dipole model

We investigate events with very forward neutrons in ep collisions at HERA using impact parameter dependent colour dipole models with and without saturation. This is the first study of the leading

Accessing pion GPDs through the Sullivan process: is it feasible?

Describing hadronic structure is one of the most intriguing problems in physics. In this respect, generalized parton distributions (GPDs) constitute an outstanding tool, allowing to draw “three

References

SHOWING 1-10 OF 26 REFERENCES

Pionic parton distributions revisited

Abstract. Using constituent quark model constraints we calculate the gluon and sea–quark content of pions solely in terms of their valence density (fixed by $\pi N$ Drell–Yan data) and the known sea

Quark-hadron duality in electron-pion scattering

Abstract:We explore the relationship between exclusive and inclusive electromagnetic scattering from the pion, focusing on the transition region at intermediate Q2. Combining Drell-Yan data on the

Pion parton distribution function in light-front holographic QCD

The valence-quark distribution function of the pion has been of interest for decades; particularly, the profile it should adopt when (the large-x behavior) has been the subject of a long-standing