Unpolarized and helicity generalized parton distributions of the proton within lattice QCD

C Alexandrou, K Cichy, M Constantinou… - Physical review …, 2020 - APS
We present the first calculation of the x dependence of the proton generalized parton
distributions (GPDs) within lattice QCD. Results are obtained for the isovector unpolarized …

Reconstructing QCD spectral functions with Gaussian processes

J Horak, JM Pawlowski, J Rodríguez-Quintero… - Physical Review D, 2022 - APS
We reconstruct ghost and gluon spectral functions in 2+ 1 flavor QCD with Gaussian process
regression. This framework allows us to largely suppress spurious oscillations and other …

Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural Networks

J Karpie, K Orginos, A Rothkopf… - Journal of High Energy …, 2019 - Springer
A bstract The computation of the parton distribution functions (PDF) or distribution
amplitudes (DA) of hadrons from first principles lattice QCD constitutes a central open …

Transversity GPDs of the proton from lattice QCD

C Alexandrou, K Cichy, M Constantinou… - Physical Review D, 2022 - APS
We present the first calculation of the x dependence of the isovector transversity generalized
parton distributions (GPDs) for the proton within lattice QCD. We compute the matrix …

Flavor nonsinglet parton distribution functions from lattice QCD at physical quark masses via the pseudodistribution approach

M Bhat, K Cichy, M Constantinou, A Scapellato - Physical Review D, 2021 - APS
One of the great challenges of QCD is to determine the partonic structure of the nucleon from
first principles. In this work, we provide such a determination of the flavor nonsinglet (ud) …

Numerical analytic continuation of Euclidean data

RA Tripolt, P Gubler, M Ulybyshev… - Computer Physics …, 2019 - Elsevier
In this work we present a direct comparison of three different numerical analytic continuation
methods: the Maximum Entropy Method, the Backus–Gilbert method and the Schlessinger …

Nonperturbative strong coupling at timelike momenta

J Horak, JM Pawlowski, J Turnwald, JM Urban, N Wink… - Physical Review D, 2023 - APS
We compute the strong coupling constant of Landau gauge QCD in the full complex
momentum plane, both directly and via spectral reconstruction. In particular, we consider the …

Continuum limit of parton distribution functions from the pseudodistribution approach on the lattice

M Bhat, W Chomicki, K Cichy, M Constantinou… - Physical Review D, 2022 - APS
Precise quantification of the structure of nucleons is one of the crucial aims of hadronic
physics for the coming years. The expected progress related to ongoing and planned …

Hybrid Monte Carlo study of competing order in the extended fermionic Hubbard model on the hexagonal lattice

P Buividovich, D Smith, M Ulybyshev, L Von Smekal - Physical Review B, 2018 - APS
Using first-principle Hybrid Monte Carlo (HMC) simulations, we carry out an unbiased study
of the competition between spin-density wave (SDW) and charge-density wave (CDW) order …

Electric conductivity in finite-density lattice gauge theory with dynamical fermions

PV Buividovich, D Smith, L von Smekal - Physical Review D, 2020 - APS
We study the dependence of the electric conductivity on chemical potential in finite-density
SU (2) gauge theory with N f= 2 flavors of rooted staggered sea quarks, in combination with …