Probing nucleon strange and charm distributions with lattice QCD
arXiv:2005.01124 · doi:10.1103/PhysRevD.104.094511
Abstract
We present the first lattice-QCD calculation of the unpolarized strange and charm parton distribution functions using large-momentum effective theory (LaMET). We use a lattice ensemble with 2+1+1 flavors of highly improved staggered quarks (HISQ) generated by MILC collaboration, with lattice spacing fm and MeV, and clover valence fermions with two valence pion masses: 310 and 690 MeV. We use momentum-smeared sources to improve the signal up to nucleon boost momentum GeV, and determine nonperturbative renormalization factors in RI/MOM scheme. We compare our lattice results with the matrix elements obtained from matching the PDFs from CT18NNLO and NNPDF3.1NNLO global fits. Our data support the assumptions of strange-antistrange and charm-anticharm symmetry that are commonly used in global PDF fits, and we find smaller than expected parton distribution at mid to small .
arXiv comment7 pages, 10 figures
References in corpus (65)
- New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
- LHAPDF6: parton density access in the LHC precision era
- Parton distributions from high-precision collider data
- The Chroma Software System for Lattice QCD
- Parton Physics on Euclidean Lattice
- New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
- Flavor Symmetry and the Static Potential with Hypercubic Blocking
- Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
- Massive Fermions in Lattice Gauge Theory
- Uncertainties of predictions from parton distribution functions II: the Hessian method
- Quasi-PDFs, momentum distributions and pseudo-PDFs
- Lattice QCD ensembles with four flavors of highly improved staggered quarks
- Exploring hadrons' partonic structure using ab initio lattice QCD calculations
- Effective noise reduction techniques for disconnected loops in Lattice QCD
- A new class of variance reduction techniques using lattice symmetries
- Nucleon Helicity and Transversity Parton Distributions from Lattice QCD
- Flavor Structure of the Nucleon Sea from Lattice QCD
- Novel quark smearing for hadrons with high momenta in lattice QCD
- A Lattice Calculation of Parton Distributions
- Factorization Theorem Relating Euclidean and Light-Cone Parton Distributions
- One-Loop Matching for Parton Distributions: Non-Singlet Case
- A complete non-perturbative renormalization prescription for quasi-PDFs
- Adaptive multigrid algorithm for the lattice Wilson-Dirac operator
- Reconstruction of light-cone parton distribution functions from lattice QCD simulations at the physical point
- Pion Valence Quark Distribution from Matrix Element Calculated in Lattice QCD
- Reanalysis of the EMC charm production data with extrinsic and intrinsic charm at NLO
- Parton Distribution Function with Non-perturbative Renormalization from Lattice QCD
- Neutron Electric Dipole Moment and Tensor Charges from Lattice QCD
- Pion Valence Structure from Ioffe Time Pseudo-Distributions
- Transversity parton distribution functions from lattice QCD
- Iso-vector and Iso-scalar Tensor Charges of the Nucleon from Lattice QCD
- Measurement of the muon charge asymmetry in inclusive pp to WX production at sqrt(s) = 7 TeV and an improved determination of light parton distribution functions
- Nonperturbative Evolution of Parton Quasi-Distributions
- Updated Lattice Results for Parton Distributions
- First direct lattice-QCD calculation of the -dependence of the pion parton distribution function
- A review of the intrinsic heavy quark content of the nucleon
- An Unbiased Hessian Representation for Monte Carlo PDFs
- Charmed-Baryon Spectroscopy from Lattice QCD with N_f=2+1+1 Flavors
- Measurement of the production of a W boson in association with a charm quark in pp collisions at sqrt(s)=7 TeV with the ATLAS detector
- Matching the Quasi Parton Distribution in a Momentum Subtraction Scheme
- Pion distribution amplitude from Euclidean correlation functions: Exploring universality and higher-twist effects
- Heavy quark mass expansion and intrinsic charm in light hadrons
- Relativistic Heavy Quarks on the Lattice
- Proton Isovector Helicity Distribution on the Lattice at Physical Pion Mass
- New limits on intrinsic charm in the nucleon from global analysis of parton distributions
- Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural Networks
- Moments of Ioffe time parton distribution functions from non-local matrix elements
- Relativistic Heavy Quark Effective Action
- Padé - Z Estimator of Determinants
- Gluon Quasi-PDF From Lattice QCD
- Phenomenology of nonperturbative charm in the nucleon
- Improved Parton Distribution Functions at Physical Pion Mass
- Parton Distribution Functions from Ioffe time pseudo-distributions
- One-loop evolution of parton pseudo-distribution functions on the lattice
- Unpolarized isovector quark distribution function from Lattice QCD: A systematic analysis of renormalization and matching
- Pion distribution amplitude from Euclidean correlation functions
- Non-perturbatively Determined Relativistic Heavy Quark Action
- Complete Matching for Quasi-distribution Functions in Large Momentum Effective Theory
- Gluon Pseudo-Distributions at Short Distances: Forward Case
- Parton distribution functions from reduced Ioffe-time distributions
- Flavor decomposition for the proton helicity parton distribution functions
- Parton distribution functions on the lattice and in the continuum
- Factorization of Large-x Quark Distributions in a Hadron
- UKQCD's latest results for the static quark potential and light hadron spectrum with O(a) improved dynamical fermions
- Flavour-singlet pseudoscalar and scalar mesons
Cited by in corpus (11)
- Large-Momentum Effective Theory
- Parton distributions and lattice QCD calculations: toward 3D structure
- Lattice continuum-limit study of nucleon quasi-PDFs
- The persistent nonperturbative charm enigma
- First Glimpse into the Kaon Gluon Parton Distribution Using Lattice QCD
- Gluon Parton Distribution of the Nucleon from 2+1+1-Flavor Lattice QCD in the Physical-Continuum Limit
- One-Loop Hybrid Renormalization Matching Kernels for Quasi-Parton Distributions
- Non-singlet quark helicity PDFs of the nucleon from pseudo-distributions
- Impact of Lattice Strangeness Asymmetry Data in the CTEQ-TEA Global Analysis
- Theoretical tools for neutrino scattering: interplay between lattice QCD, EFTs, nuclear physics, phenomenology, and neutrino event generators
- Light-cone PDFs and GPDs from Lattice QCD