Nucleon electroweak form factors using spin-improved holographic light-front wavefunctions
arXiv:2105.02213 · doi:10.1016/j.nuclphysa.2021.122334
Abstract
We construct spin-improved holographic light front wavefunctions for the nucleons (viewed as quark-diquark systems) and use them to successfully predict their electromagnetic Sachs form factors, their electromagnetic charge radii, as well as the axial form factor, charge and radius of the proton. The confinement scale is the universal mass scale of light-front holography, previously extracted from spectroscopic data for light hadrons. With the Dirac and Pauli form factors normalized using the quark counting rules and the measured anomalous magnetic moments respectively, the masses of the quark and diquark are the only remaining adjustable parameters. We fix them using the data set for the proton's Dirac-to-Pauli form factor ratio, and then predict all other data without any further adjustments of parameters. Agreement with data at low momentum-transfer is excellent. Our findings support the idea that light (pseudoscalar and vector) mesons and the nucleons share a nonperturbative universal holographic light-front wavefunction which is modified differently by their spin structures.
arXiv comment14 pages, 5 figures, 1 table; minor modifications to the text, accepted by Nuclear Physics A
References in corpus (36)
- The ratio of proton's electric to magnetic form factors measured by polarization transfer
- Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2
- Light-Front Holographic QCD and Emerging Confinement
- Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
- Axial structure of the nucleon
- Light-Cone Representation of the Spin and Orbital Angular Momentum of Relativistic Composite Systems
- Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2
- Low energy analysis of the nucleon electromagnetic form factors
- A percent-level determination of the nucleon axial coupling from Quantum Chromodynamics
- Precise Neutron Magnetic Form Factors
- The Charge Form Factor of the Neutron from the Reaction \pol{2H}(\pol{e},e'n)p
- Measurement of the Electric Form Factor of the Neutron at Q^2 = 0.3-0.8 (GeV/c)^2
- An AdS/QCD holographic wavefunction for the rho meson and diffractive rho meson electroproduction
- The neutron charge form factor and target analyzing powers from pol.3He(pol e,e'n)-scattering
- Threefold Complementary Approach to Holographic QCD
- A Precise Measurement of the Neutron Magnetic Form Factor GMn in the Few-GeV2 Region
- Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass
- Measurements of the neutron electric to magnetic form factor ratio GEn/GMn via the ^2H(\vec{e},e'\vec{n})^1H reaction to Q^2 = 1.45 (GeV/c)^2
- Light-front quark model consistent with Drell-Yan-West duality and quark counting rules
- Generalized parton distributions and transverse densities in a light-front quark-diquark model for the nucleons
- Nucleon Axial Radius and Muonic Hydrogen - A New Analysis and Review
- Extraction of two-photon contributions to the proton form factors
- The Charge Form Factor of the Neutron at Low Momentum Transfer from the Reaction
- Analysis of nucleon electromagnetic form factors from light-front holographic QCD : The spacelike region
- Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q^2 = 0.1 - 0.6 (GeV/c)^2
- A light front quark-diquark model for the nucleons
- Nucleon and flavor form factors in a light front quark model in AdS/QCD
- Diffractive and production at HERA using an AdS/QCD holographic light-front meson wavefunction
- Hadronic Superpartners from Superconformal and Supersymmetric Algebra
- Extraction of nucleon axial charge and radius from lattice QCD results using baryon chiral perturbation theory
- Measurement of the neutron charge radius and the role of its constituents
- Spin effects in the pion holographic light-front wavefunction
- Meson/Baryon/Tetraquark Supersymmetry from Superconformal Algebra and Light-Front Holography
- Predicting the light-front holographic TMDs of the pion
- Nucleon axial form factor from generalized parton distributions
- Light-front holographic radiative transition form factors for light mesons