Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD

Abstract

We present the first lattice QCD calculation of the charm quark contribution to the nucleon electromagnetic form factors $G_{E,M}^c(Q^2)$ in the momentum transfer range $0\le Q^2\le 1.4$ $\mathrm{Ge}{\mathrm{V}}^2$. The quark mass dependence, finite lattice spacing and volume corrections are taken into account simultaneously based on the calculation on three gauge ensembles including one at the physical pion mass. The nonzero value of the charm magnetic moment ${\mu }_M^c=-0.00127(38{)}_{\mathrm{stat}}(5{)}_{\mathrm{sys}}$, as well as the Pauli form factor, reflects a nontrivial role of the charm sea in the nucleon spin structure. The nonzero $G_E^c(Q^2)$ indicates the existence of a nonvanishing asymmetric charm-anticharm sea in the nucleon. Performing a nonperturbative analysis based on holographic QCD and the generalized Veneziano model, we study the constraints on the $[c(x)-\bar{c}(x)]$ distribution from the lattice QCD results presented here. Our results provide complementary information and motivation for more detailed studies of physical observables that are sensitive to intrinsic charm and for future global analyses of parton distributions including asymmetric charm-anticharm distribution.

arXiv commentPublished version, Physics Letters B

References in corpus (66)

• The Large N Limit of Superconformal Field Theories and Supergravity
• Parton distributions for the LHC Run II
• Gauge-Invariant Decomposition of Nucleon Spin and Its Spin-Off
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Light-Front Holographic QCD and Emerging Confinement
• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• Leptoproduction of Heavy Quarks II -- A Unified QCD Formulation of Charged and Neutral Current Processes from Fixed-target to Collider Energies
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Domain wall QCD with physical quark masses
• Model-independent description of $B\to \pi l\nu$ decays and a determination of $|V_{ub}|$
• Light-Front Holography: A First Approximation to QCD
• Constraints on large-$x$ parton distributions from new weak boson production and deep-inelastic scattering data
• Constraints on Form Factors For Exclusive Semileptonic Heavy to Light Meson Decays
• Heavy quarks in deep-inelastic scattering
• Charm electroproduction viewed in the variable-flavour number scheme versus fixed-order perturbation theory
• Continuum Limit Physics from 2+1 Flavor Domain Wall QCD
• The ABM parton distributions tuned to LHC data
• Measurement of Differences Between J/Psi and Psi' Suppression in p-A Collisions
• The Quark/Antiquark Asymmetry of the Nucleon Sea
• A percent-level determination of the nucleon axial coupling from Quantum Chromodynamics
• Measurement of the transverse momentum and ${\varphi }_{\eta }^{\ast }$ distributions of Drell-Yan lepton pairs in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Stochastic Estimation with $Z_2$ Noise
• Measurement of $W^{\pm }$ and $Z$-boson production cross sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Universality of Generalized Parton Distributions in Light-Front Holographic QCD
• The Charm Parton Content of the Nucleon
• Reanalysis of the EMC charm production data with extrinsic and intrinsic charm at NLO
• A review of the intrinsic heavy quark content of the nucleon
• Defining the Proton Radius: a Unified Treatment
• $\pi$N and strangeness sigma terms at the physical point with chiral fermions
• Effect of changes of variable flavor number scheme on parton distribution functions and predicted cross sections
• Heavy quark mass expansion and intrinsic charm in light hadrons
• CT14 Intrinsic Charm Parton Distribution Functions from CTEQ-TEA Global Analysis
• Measurement of the Z boson differential cross section in transverse momentum and rapidity in proton-proton collisions at 8 TeV
• New limits on intrinsic charm in the nucleon from global analysis of parton distributions
• Strangeness and charmness content of nucleon from overlap fermions on 2+1-flavor domain-wall fermion configurations
• Nucleon Masses and Magnetic Moments in a Finite Volume
• Perturbative generation of a strange-quark asymmetry in the nucleon
• Light-Cone Models for Intrinsic Charm and Bottom
• First measurement of charm production in fixed-target configuration at the LHC
• Overlap Valence on 2+1 Flavor Domain Wall Fermion Configurations with Deflation and Low-mode Substitution
• Intrinsic Charm Parton Distribution Functions from CTEQ-TEA Global Analysis
• High-precision calculation of the strange nucleon electromagnetic form factors
• Analysis of nucleon electromagnetic form factors from light-front holographic QCD : The spacelike region
• Universal Effective Hadron Dynamics from Superconformal Algebra
• ON THE INTRINSIC CHARM COMPONENT OF THE NUCLEON
• Supersymmetry Across the Light and Heavy-Light Hadronic Spectrum
• Charm and strange quark masses and $f_{D_s}$ from overlap fermions
• HERA Anomaly and Hard Charm in the Nucleon
• Strange Quark Magnetic Moment of the Nucleon at Physical Point
• Supersymmetry Across the Light and Heavy-Light Hadronic Spectrum II
• Higgs Hadroproduction at Large Feynman x
• Unified Description of Polarized and Unpolarized Quark Distributions in the Proton
• Nucleon strange electromagnetic form factors
• Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models
• Supersymmetry in the Double-Heavy Hadronic Spectrum
• IC at IC: IceCube can constrain the intrinsic charm of the proton
• Strange electromagnetic form factors of the nucleon with $N_f=2+1$ $\mathcal{O}(a)$-improved Wilson fermions
• The ${\Delta }_{mix}$ parameter in the overlap on domain-wall mixed action
• Asymmetries in the Production of ${\Lambda }_c^{+}$ and ${\Lambda }_c^{-}$ Baryons in 500 GeV/c ${\pi }^{-}$ Nucleon Interactions
• Sea Quarks Contribution to the Nucleon Magnetic Moment and Charge Radius at the Physical Point
• Asymmetries in the production of lambda zero, cascade minus, and omega minus hyperons in 500 GeV/c pi minus-Nucleon Interactions
• Finite Volume Effects on the Extraction of Form Factors at Zero Momentum
• A very Practical Guide to Light Front Holographic QCD
• Differential cross sections, charge production asymmetry, and spin-density matrix elements for D*(2010) produced in 500 GeV/c pi^- nucleon interactions
• Neutral Weak Form Factors of Proton and Neutron

Cited by in corpus (23)

• 50 Years of Quantum Chromodynamics
• PANDA Phase One
• The persistent nonperturbative charm enigma
• Large-P_T inclusive photoproduction of J/psi in electron-proton collisions at HERA and the EIC
• Gluon matter distribution in the proton and pion from extended holographic light-front QCD
• Study of $Z$ bosons produced in association with charm in the forward region
• Gluon distributions and their applications to Ioffe-time distributions
• Limits on Intrinsic Charm Production from the SeaQuest Experiment
• Intrinsic charm in the nucleon and charm production at large rapidities in collinear, hybrid and $k_T$-factorization approaches
• PDF in PDFs from Hadronic Tensor and LaMET
• Bottom Tetraquark Production at RHIC?
• Energy Dependence of Intrinsic Charm Production: What is the Best Energy for Observation?
• Polarized gluon distribution in the proton from holographic light-front QCD
• Light-Front Holography and Supersymmetric Conformal Algebra: A Novel Approach to Hadron Spectroscopy, Structure, and Dynamics
• Entropy from entangled parton states and high-energy scattering behavior
• Connected and Disconnected Sea Partons from CT18 Parametrization of PDFs
• Contribution from Intrinsic Charm Production to Fixed-Target Interactions at the LHC
• Flavor asymmetry from the non-perturbative nucleon sea
• Heavy quark contribution to the electromagnetic properties of the nucleon
• Challenges in the extraction of physics beyond the Standard Model from electron scattering
• Parton distribution functions and QCD coupling constant from LHC and non-LHC data
• The Forward Physics Facility at the High-Luminosity LHC
• Measurements of charmed meson and antimeson production asymmetries at $\sqrt{s}=13.6$ TeV