Updated lattice results for parton distributions

@article{Alexandrou2017UpdatedLR,
  title={Updated lattice results for parton distributions},
  author={Constantia Alexandrou and Krzysztof Cichy and Martha Constantinou and K. Hadjiyiannakou and Karl Jansen and Fernanda Steffens and Christian Wiese},
  journal={Physical Review D},
  year={2017},
  volume={96},
  pages={014513}
}
We provide an analysis of the $x$ dependence of the bare unpolarized, helicity, and transversity isovector parton distribution functions (PDFs) from lattice calculations employing (maximally) twisted mass fermions. The $x$ dependence of the calculated PDFs resembles the one of the phenomenological parameterizations, a feature that makes this approach very promising. Furthermore, we apply momentum smearing for the relevant matrix elements to compute the lattice PDFs and find a large improvement… 

Systematic uncertainties in parton distribution functions from lattice QCD simulations at the physical point

We present a detailed study of the helicity-dependent and helicity-independent collinear parton distribution functions (PDFs) of the nucleon, using the quasi-PDF approach. The lattice QCD computation

Quasi-PDFs with twisted mass fermions

We discuss the recent progress in extracting partonic functions from the quasi-distribution approach, using twisted mass fermions. This concerns, among others, the investigation of several sources of

Light-Cone Parton Distribution Functions from Lattice QCD.

This first direct nonperturbative evaluation opens a most promising path to compute PDFs in an ab initio way on the lattice and provides a framework for investigating also a wider class of similar quantities, which require the evaluation of hadronic matrix elements of nonlocal operators.

Complete matching for quasidistribution functions in large momentum effective theory

We complete the procedure of extracting parton distribution functions (PDFs) using large momentum effective theory (LaMET) at leading power accuracy in the hadron momentum. We derive a general

Transversity parton distribution functions from lattice QCD

We present the first direct calculation of the transversity parton distribution function within the nucleon from lattice QCD. The calculation is performed using simulations with the light quark mass

The continuum and leading twist limits of parton distribution functions in lattice QCD

Abstract In this study, we present continuum limit results for the unpolarized parton distribution function of the nucleon computed in lattice QCD. This study is the first continuum limit using the

Improved parton distribution functions at the physical pion mass

We present the first lattice results on isovector unpolarized and longitudinally polarized parton distribution functions (PDFs) at physical pion mass. The PDFs are obtained using the large-momentum

Parton distribution functions of Δ+ on the lattice

We perform a first calculation for the unpolarized parton distribution function of the $\Delta^+$ baryon using lattice QCD simulations within the framework of Large Momentum Effective Theory. Two

Parton distribution function with nonperturbative renormalization from lattice QCD

We present lattice results for the isovector unpolarized parton distribution with nonperturbative regularization-invariant momentum-subtraction scheme (RI/MOM) renormalization on the lattice. In the
...

References

SHOWING 1-10 OF 68 REFERENCES

Lattice calculation of parton distributions

We report on our exploratory study for the direct evaluation of the parton distribution functions from lattice QCD, based on a recently proposed new approach. We present encouraging results using Nf

Parton distribution function with nonperturbative renormalization from lattice QCD

We present lattice results for the isovector unpolarized parton distribution with nonperturbative regularization-invariant momentum-subtraction scheme (RI/MOM) renormalization on the lattice. In the

Perturbative renormalization of quasi-parton distribution functions

In this paper we present results for the renormalization of gauge invariant nonlocal fermion operators which contain a Wilson line, to one-loop level in lattice perturbation theory. Our calculations

First results with twisted mass fermions towards the computation of parton distribution functions on the lattice

We report on our exploratory study for the evaluation of the parton distribution functions from lattice QCD, based on a new method proposed in Ref.~arXiv:1305.1539. Using the example of the nucleon,

Hadron Structure

This is a review of recent developments in hadron structure w ithin the framework of Lattice QCD. The main focus is on recent achievements in the evaluation of nucleon quantities, such as the axial

Flavor structure of the nucleon sea from lattice QCD

We present the first direct lattice calculation of the isovector sea-quark distributions in the nucleon within the framework of the large-momentum effective field theory proposed recently. We use N f

Global parton distributions with nuclear and finite- Q 2 corrections

We present three new sets of next-to-leading order parton distribution functions (PDFs) determined by global fits to a wide variety of data for hard scattering processes. The analysis includes target

Iterative Monte Carlo analysis of spin-dependent parton distributions

We present a comprehensive new global QCD analysis of polarized inclusive deep-inelastic scattering, including the latest high-precision data on longitudinal and transverse polarization asymmetries

Accessing high momentum states in lattice QCD

Two measures are defined to evaluate the coupling strength of smeared interpolating operators to hadronic states at a variety of momenta. Of particular interest is the extent to which strong overlap
...