143 citations · 734 across the 27 of their papers we have counts for
30 papers
Femtoscale imaging of the proton with Ioffe-time distributions
Robert G. Edwards, Joe Karpie, Christopher Monahan +5
Mapping how strongly interacting constituents are distributed within protons is a key goal of nuclear physics and a major direction of the future Electron Ion Collider program. We…
Reconstructing the full kinematic dependence of GPDs from pseudo-distributions
Hervé Dutrieux, Robert G. Edwards, Joe Karpie +7
We propose a reconstruction of the full dependence of unpolarized isovector proton generalized parton distributions (GPDs) and from lattice QCD data…
Accessing the Gluon Momentum Fraction of Nucleons through the Gradient Flow
Robert Edwards, Joe Karpie, Lorenzo Maio +5
We calculate the gluon momentum fraction of the nucleon using lattice quantum chromodynamics (QCD), with a nonperturbative renormalization technique based on the gradient flow. The…
Moments of parton distributions functions of the pion from lattice QCD using gradient flow
Anthony Francis, Patrick Fritzsch, Rohith Karur +7
We present a nonperturbative determination of the pion valence parton distribution function (PDF) moment ratios …
Gaussian Processes for Inferring Parton Distributions
Yamil Cahuana Medrano, Hervé Dutrieux, Joseph Karpie +2
The extraction of parton distribution functions (PDFs) from experimental or lattice QCD data is an ill-posed inverse problem, where regularization strongly impacts both systematic…
Gradient flow for parton distribution functions: first application to the pion
Anthony Francis, Patrick Fritzsch, Robert V. Harlander +9
Parton distribution functions (PDFs) are central to precision QCD phenomenology. Their Mellin moments can be computed on the lattice, but direct determinations using local operator…
Comment on "LaMET's Asymptotic Extrapolation vs. Inverse Problem"
Hervé Dutrieux, Joe Karpie, Christopher J. Monahan +4
In arXiv:2504.17706 {Dutrieux:2025jed} we criticized the excessive model-dependence introduced by rigid few-parameter fits to extrapolate lattice data in the large momentum effecti…
Window observables for benchmarking parton distribution functions
Joe Karpie, Christopher J. Monahan, Kostas Orginos +1
Global analysis of collider and fixed-target experimental data and calculations from lattice quantum chromodynamics (QCD) are used to gain complementary information on the structur…
Inverse problem in the LaMET framework
Hervé Dutrieux, Joe Karpie, Christopher J. Monahan +4
One proposal to compute parton distributions from first principles is the large momentum effective theory (LaMET), which requires the Fourier transform of matrix elements computed…
A simple non-parametric reconstruction of parton distributions from limited Fourier information
Hervé Dutrieux, Joseph Karpie, Kostas Orginos +1
Some calculations of parton distributions from first principles only give access to a limited range of Fourier modes of the function to reconstruct. We present a physically motivat…
Probing higher moments of pion parton distribution functions
Anthony Francis, Patrick Fritzsch, Rohith Karur +7
We present the first numerical investigation of the method proposed in Ref. [1] to utilize gradient flow to obtain precise determinations of higher moments of PDFs from lattice QCD…
Towards Unpolarized GPDs from Pseudo-Distributions
Hervé Dutrieux, Robert G. Edwards, Colin Egerer +7
We present an exploration of the unpolarized isovector proton generalized parton distributions (GPDs) and in the pseudo-distribution formalism…
Extracting the Pion Distribution Amplitude from Lattice QCD through Pseudo-Distributions
Daniel Kovner, Joe Karpie, Konstantinos Orginos +2
The Light-Cone Distribution Amplitude (LCDA) encodes the non-perturbative information of the leading Fock component of the hadron wave function, therefore required for processes in…
Evolution of Parton Distribution Functions in the Short-Distance Factorization Scheme
H. Dutrieux, J. Karpie, C. Monahan +2
Lattice QCD offers the possibility of computing parton distributions from first principles, although not in the usual factorization scheme. We study in this paper t…
Gluon helicity from global analysis of experimental data and lattice QCD Ioffe time distributions
J. Karpie, R. M. Whitehill, W. Melnitchouk +6
We perform a new global analysis of spin-dependent parton distribution functions with the inclusion of Ioffe time pseudo-distributions computed in lattice QCD (LQCD), which are dir…
Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions
Robert G. Edwards, Colin Egerer, Joseph Karpie +9
The non-singlet helicity quark parton distribution functions (PDFs) of the nucleon are determined from lattice QCD, by jointly leveraging pseudo-distributions and the distillation…
Towards the determination of the gluon helicity distribution in the nucleon from lattice quantum chromodynamics
Colin Egerer, Bálint Joó, Joseph Karpie +10
We present the first exploratory lattice quantum chromodynamics (QCD) calculation of the polarized gluon Ioffe-time pseudo-distribution in the nucleon. The Ioffe-time pseudo-distri…
Complementarity of experimental and lattice QCD data on pion parton distributions
P. C. Barry, C. Egerer, J. Karpie +8
We extract pion parton distribution functions (PDFs) in a Monte Carlo global QCD analysis of experimental data together with reduced Ioffe time pseudo-distributions and matrix elem…
The transversity parton distribution function of the nucleon using the pseudo-distribution approach
Colin Egerer, Christos Kallidonis, Joseph Karpie +8
We present a determination of the non-singlet transversity parton distribution function (PDF) of the nucleon, normalized with respect to the tensor charge at GeV from l…
Towards High-Precision Parton Distributions From Lattice QCD via Distillation
Colin Egerer, Robert G. Edwards, Christos Kallidonis +5
We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-st…
Unpolarized gluon distribution in the nucleon from lattice quantum chromodynamics
Tanjib Khan, Raza Sabbir Sufian, Joseph Karpie +9
In this study, we present a determination of the unpolarized gluon Ioffe-time distribution in the nucleon from a first principles lattice quantum chromodynamics calculation. We car…
The Continuum and Leading Twist Limits of Parton Distribution Functions in Lattice QCD
Joseph Karpie, Kostas Orginos, Anatoly Radyushkin +1
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 u…
Neural-network analysis of Parton Distribution Functions from Ioffe-time pseudodistributions
Luigi Del Debbio, Tommaso Giani, Joseph Karpie +3
We extract two nonsinglet nucleon Parton Distribution Functions from lattice QCD data for reduced Ioffe-time pseudodistributions. We perform such analysis within the NNPDF framewor…
Parton Distribution Functions from Ioffe Time Pseudodistributions from Lattice Calculations: Approaching the Physical Point
Bálint Joó, Joseph Karpie, Kostas Orginos +3
We present results for the unpolarized parton distribution function of the nucleon computed in lattice QCD at the physical pion mass. This is the first study of its kind employing…