skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region

Abstract

We present a comprehensive analysis of the space-like nucleon electromagnetic form factors and their flavor decomposition within the framework of light-front holographic QCD. We show that the inclusion of the higher Fock components $$|{qqqq\bar{q}}$$ has a significant effect on the spin-flip elastic Pauli form factor and almost zero effect on the spin-conserving Dirac form factor. We present light-front holographic QCD results for the proton and neutron form factors at any momentum transfer range, including asymptotic predictions, and show that our results agree with the available experimental data with high accuracy. In order to correctly describe the Pauli form factor we need an admixture of a five quark state of about 30$$\%$$ in the proton and about 40$$\%$$ in the neutron. We also extract the nucleon charge and magnetic radii and perform a flavor decomposition of the nucleon electromagnetic form factors. The free parameters needed to describe the experimental nucleon form factors are very few: two parameters for the probabilities of higher Fock states for the spin-flip form factor and a phenomenological parameter $r$, required to account for possible SU(6) spin-flavor symmetry breaking effects in the neutron, whereas the Pauli form factors are normalized to the experimental values of the anomalous magnetic moments. As a result, the covariant spin structure for the Dirac and Pauli nucleon form factors prescribed by AdS$$_5$$ semiclassical gravity incorporates the correct twist scaling behavior from hard scattering and also leads to vector dominance at low energy.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Univ. of Kentucky, Lexington, KY (United States)
  2. Univ. de Costa Rica, San Jose (Costa Rica)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Institut fur Theoretische Physik der Univ., Heidelberg (Germany)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1333524
Alternate Identifier(s):
OSTI ID: 1338862
Report Number(s):
SLAC-PUB-16806
Journal ID: ISSN 2470-0010; PRVDAQ; arXiv:1609.06688
Grant/Contract Number:  
AC02-76SF00515; DE–AC02–76SF00515; SLAC-PUB–16806; DE–AC05–06OR23177
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; lattice; theory-nucl; phenomenology-HEP; HEPPH

Citation Formats

Sufian, Raza Sabbir, de Teramond, Guy F., Brodsky, Stanley J., Deur, Alexandre, and Dosch, Hans Gunter. Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.014011.
Sufian, Raza Sabbir, de Teramond, Guy F., Brodsky, Stanley J., Deur, Alexandre, & Dosch, Hans Gunter. Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region. United States. doi:10.1103/PhysRevD.95.014011.
Sufian, Raza Sabbir, de Teramond, Guy F., Brodsky, Stanley J., Deur, Alexandre, and Dosch, Hans Gunter. Tue . "Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region". United States. doi:10.1103/PhysRevD.95.014011. https://www.osti.gov/servlets/purl/1333524.
@article{osti_1333524,
title = {Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region},
author = {Sufian, Raza Sabbir and de Teramond, Guy F. and Brodsky, Stanley J. and Deur, Alexandre and Dosch, Hans Gunter},
abstractNote = {We present a comprehensive analysis of the space-like nucleon electromagnetic form factors and their flavor decomposition within the framework of light-front holographic QCD. We show that the inclusion of the higher Fock components $|{qqqq\bar{q}}$ has a significant effect on the spin-flip elastic Pauli form factor and almost zero effect on the spin-conserving Dirac form factor. We present light-front holographic QCD results for the proton and neutron form factors at any momentum transfer range, including asymptotic predictions, and show that our results agree with the available experimental data with high accuracy. In order to correctly describe the Pauli form factor we need an admixture of a five quark state of about 30$\%$ in the proton and about 40$\%$ in the neutron. We also extract the nucleon charge and magnetic radii and perform a flavor decomposition of the nucleon electromagnetic form factors. The free parameters needed to describe the experimental nucleon form factors are very few: two parameters for the probabilities of higher Fock states for the spin-flip form factor and a phenomenological parameter $r$, required to account for possible SU(6) spin-flavor symmetry breaking effects in the neutron, whereas the Pauli form factors are normalized to the experimental values of the anomalous magnetic moments. As a result, the covariant spin structure for the Dirac and Pauli nucleon form factors prescribed by AdS$_5$ semiclassical gravity incorporates the correct twist scaling behavior from hard scattering and also leads to vector dominance at low energy.},
doi = {10.1103/PhysRevD.95.014011},
journal = {Physical Review D},
issn = {2470-0010},
number = 1,
volume = 95,
place = {United States},
year = {2017},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Threefold complementary approach to holographic QCD
journal, February 2014


Laser spectroscopy of muonic deuterium
journal, August 2016


Quantum Chromodynamic Predictions for the Deuteron Form Factor
journal, July 1983

  • Brodsky, Stanley J.; Ji, Chueng-Ryong; Lepage, G. P.
  • Physical Review Letters, Vol. 51, Issue 2
  • DOI: 10.1103/PhysRevLett.51.83

Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q 2 = 8.5 GeV 2
journal, June 2010


Scaling Laws at Large Transverse Momentum
journal, October 1973


Electromagnetic form factors of the proton at squared four-momentum transfers between 10 and 50 fm−2
journal, April 1971


Conformal invariance in quantum mechanics
journal, August 1976

  • de Alfaro, V.; Fubini, S.; Furlan, G.
  • Il Nuovo Cimento A, Vol. 34, Issue 4
  • DOI: 10.1007/BF02785666

Hadronic Spectra and Light-Front Wave Functions in Holographic QCD
journal, May 2006


Meson transition form factors in light-front holographic QCD
journal, October 2011


Publisher's Note: Proton elastic form factor ratios to Q 2 = 3.5 GeV 2 by polarization transfer [Phys. Rev. C 71, 055202 (2005)]
journal, June 2005


Structure of vector mesons in a holographic model with linear confinement
journal, November 2007


Proton G E / G M from beam-target asymmetry
journal, September 2006


Interpretation of the flavor dependence of nucleon form factors in a generalized parton distribution model
journal, December 2013

  • Gonzalez-Hernandez, J. Osvaldo; Liuti, Simonetta; Goldstein, Gary R.
  • Physical Review C, Vol. 88, Issue 6
  • DOI: 10.1103/PhysRevC.88.065206

Precision Rosenbluth Measurement of the Proton Elastic Form Factors
journal, April 2005


Absolute electron-proton cross sections at low momentum transfer measured with a high pressure gas target system
journal, January 1980


Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q 2 = 1.58 GeV 2 Using the Reaction He 3 ( e , e n ) p p
journal, September 2013


On the interface between perturbative and nonperturbative QCD
journal, June 2016


The large $N$ limit of superconformal field theories and supergravity
journal, January 1998


Erratum: Light-front quark model consistent with Drell-Yan-West duality and quark counting rules [Phys. Rev. D 89 , 054033 (2014)]
journal, July 2015


Large-Angle Quasielastic Electron-Deuteron Scattering
journal, August 1973


Proton electromagnetic form factors: Basic notions, present achievements and future perspectives
journal, January 2015


Light-front holographic QCD and emerging confinement
journal, July 2015


Light-front quark model consistent with Drell-Yan-West duality and quark counting rules
journal, March 2014


Baryon properties from light-front holographic QCD
journal, November 2015


Dynamical Relativistic Effects in Quasielastic 1 p -Shell Proton Knockout from O 16
journal, April 2000


Measurements of electron-proton elastic cross sections for 0.4 < Q 2 < 5.5 ( GeV c ) 2
journal, July 2004


Measurement of the ratio of the proton form factors, GE/GM, at high momentum transfers and the question of scaling
journal, January 1970


Proton elastic form factor ratios to Q 2 = 3.5 GeV 2 by polarization transfer
journal, May 2005


Measurements of the proton elastic form factors for 1 Q 2 3 ( G e V / c ) 2 at SLAC
journal, June 1994


Factorization property of the deuteron
journal, May 1986


Superconformal baryon-meson symmetry and light-front holographic QCD
journal, April 2015

  • Dosch, Hans Günter; de Téramond, Guy F.; Brodsky, Stanley J.
  • Physical Review D, Vol. 91, Issue 8
  • DOI: 10.1103/PhysRevD.91.085016

Measurements of G E n / G M n from the H 2 ( e , e n ) H 1 Reaction to Q 2 = 1.45 ( G e V / c ) 2
journal, September 2003


Anomalous magnetic moment and limits on fermion substructure
journal, November 1980


Electric and Magnetic Form Factors of the Nucleon
journal, April 1963


Kinematical and dynamical aspects of higher-spin bound-state equations in holographic QCD
journal, April 2013

  • de Téramond, Guy F.; Dosch, Hans Günter; Brodsky, Stanley J.
  • Physical Review D, Vol. 87, Issue 7
  • DOI: 10.1103/PhysRevD.87.075005

Electromagnetic form factors of the peoton at low four-momentum transfer (II)
journal, July 1975


Form factors and transverse charge and magnetization densities in the hard-wall AdS/QCD model
journal, October 2016


Measurements of the electric and magnetic form factors of the proton from Q 2 =1.75 to 8.83 (GeV/ c ) 2
journal, November 1994


Nonperturbative QCD coupling and its β function from light-front holography
journal, May 2010


Backward-Angle Electron-Proton Elastic Scattering and Proton Electromagnetic Form Factors
journal, July 1971

  • Price, L. E.; Dunning, J. R.; Goitein, M.
  • Physical Review D, Vol. 4, Issue 1
  • DOI: 10.1103/PhysRevD.4.45

Flavor decomposition of the nucleon electromagnetic form factors at low Q 2
journal, June 2015


Theory of strong interactions
journal, September 1960


The QCD running coupling
journal, September 2016

  • Deur, Alexandre; Brodsky, Stanley J.; de Téramond, Guy F.
  • Progress in Particle and Nuclear Physics, Vol. 90
  • DOI: 10.1016/j.ppnp.2016.04.003

Charge Form Factor of the Neutron from the Reaction 2 H ( e , e n ) p
journal, June 1999


Proton Form Factors from Elastic Electron-Proton Scattering
journal, February 1966


Measurement of the Electric Form Factor of the Neutron at Q 2 = 0.5 and 1.0 G e V 2 / c 2
journal, January 2004


Light front cloudy bag model: Nucleon electromagnetic form factors
journal, September 2002


Nucleon electromagnetic and gravitational form factors from holography
journal, June 2009


Role of diquark correlations and the pion cloud in nucleon elastic form factors
journal, October 2014


Measurement of G E p / G M p in e p e p to Q 2 = 5.6 GeV 2
journal, February 2002


Phenomenological Model for the Electromagnetic Structure of the Proton
journal, May 1970


Survey of Nucleon Electromagnetic Form Factors
journal, March 2009


Measurement of the Electric Form Factor of the Neutron through d ( e , e n ) p at Q 2 = 0.5 ( GeV / c ) 2
journal, August 2001


G E p / G M p Ratio by Polarization Transfer in e p e p
journal, February 2000


Light-front dynamics and AdS/QCD correspondence: The pion form factor in the space- and time-like regions
journal, March 2008


SU(6) breaking effects in the nucleon elastic electromagnetic form factors
journal, November 2000


Connecting the hadron mass scale to the fundamental mass scale of quantum chromodynamics
journal, November 2015


Q 2 independence of QF 2 / F 1 , Poincaré invariance, and the nonconservation of helicity
journal, June 2002


Review of Particle Physics
journal, August 2014


Nucleon structure in a light-front quark model consistent with quark counting rules and data
journal, March 2015


Nucleon and flavor form factors in a light front quark model in AdS/QCD
journal, December 2013


The structure of the nucleon: Elastic electromagnetic form factors
journal, July 2015


Measurement of the Proton’s Electric to Magnetic Form Factor Ratio from H 1 ( e , e p )
journal, January 2007


Superconformal quantum mechanics
journal, January 1984


Nucleon structure including high Fock states in AdS/QCD
journal, August 2012


Determination of the neutron electric form factor in the D(e,e′n)p reaction and the influence of nuclear binding
journal, June 1999

  • Herberg, C.; Ostrick, M.; Andresen, H. G.
  • The European Physical Journal A, Vol. 5, Issue 2
  • DOI: 10.1007/s100500050268

Neutron charge form factor at large q 2
journal, September 2001


Study of e + e p p ¯ via initial-state radiation at BABAR
journal, May 2013


Determination of the electric and magnetic form factors of the proton in the time-like region
journal, January 1994


Low- Q 2 measurements of the proton form factor ratio μ p G E / G M
journal, November 2011


Light front quark-diquark model for the nucleons
journal, November 2016


Automodellism in the large-angle elastic scattering and structure of hadrons
journal, August 1973

  • Matveev, V. A.; Muradyan, R. M.; Tavkhelidze, A. N.
  • Lettere Al Nuovo Cimento Series 2, Vol. 7, Issue 15
  • DOI: 10.1007/BF02728133

Charge Form Factor of the Neutron at Low Momentum Transfer from the H 2 ( e , e n ) H 1 Reaction
journal, July 2008


Universal effective hadron dynamics from superconformal algebra
journal, August 2016


Nucleon form factors and spin content in a quark-diquark model with a pion cloud
journal, July 2012


Measurement of the electric form factor of the neutron at Q2 = 0.3-0.8 (GeV/ c) 2 ⋆
journal, January 2005


Determination of the neutron electric form factor from the reaction 3 He(e,e'n) at medium momentum transfer
journal, November 1999

  • Becker, J.; Andresen, H. G.; Annand, J. R. M.
  • The European Physical Journal A, Vol. 6, Issue 3
  • DOI: 10.1007/s100500050351

Quantum chromodynamics and other field theories on the light cone
journal, August 1998


Electric form factor of the neutron from the H 2 ( e →, e n ) 1 H reaction at Q 2 =0.255 (GeV/ c ) 2
journal, October 1994


Baryon spectrum from superconformal quantum mechanics and its light-front holographic embedding
journal, February 2015

  • de Téramond, Guy F.; Dosch, Hans Günter; Brodsky, Stanley J.
  • Physical Review D, Vol. 91, Issue 4
  • DOI: 10.1103/PhysRevD.91.045040

τ Decays to pions
journal, September 1990

  • Kühn, J. H.; Santamaria, A.
  • Zeitschrift für Physik C Particles and Fields, Vol. 48, Issue 3
  • DOI: 10.1007/BF01572024

Light-Front Holography: A First Approximation to QCD
journal, February 2009


Nucleon and Roper electromagnetic elastic and transition form factors
journal, February 2012


Hard Scattering and Gauge/String Duality
journal, January 2002


Flavor Decomposition of the Elastic Nucleon Electromagnetic Form Factors
journal, June 2011


Deep inelastic scattering and gauge/string duality
journal, May 2003


Flavor decomposition of the nucleon electromagnetic form factors
journal, December 2012


Measurements of the Electric Form Factor of the Neutron up to Q 2 = 3.4 GeV 2 Using the Reaction 3 He ( e , e n ) p p
journal, December 2010


Aspects of hadron physics
journal, January 2007

  • Roberts, C. D.; Bhagwat, M. S.; Höll, A.
  • The European Physical Journal Special Topics, Vol. 140, Issue 1
  • DOI: 10.1140/epjst/e2007-00003-5

Connection of Elastic Electromagnetic Nucleon Form Factors at Large Q 2 and Deep Inelastic Structure Functions Near Threshold
journal, January 1970


Measurement of proton and neutron electromagnetic form factors at squared four-momentum transfers up to 3 (GeV/c)2
journal, July 1973


Final analysis of proton form factor ratio data at Q 2 = 4.0 , 4.8, and 5.6 GeV 2
journal, April 2012


Electroweak structure of the nucleon, meson cloud, and light-cone wave functions
journal, October 2007


Three-Body Nature of N * and Δ * Resonances from Sequential Decay Chains
journal, March 2015


    Works referencing / citing this record:

    The spin structure of the nucleon
    journal, June 2019

    • Deur, Alexandre; Brodsky, Stanley J.; de Téramond, Guy F.
    • Reports on Progress in Physics, Vol. 82, Issue 7
    • DOI: 10.1088/1361-6633/ab0b8f

    The spin structure of the nucleon
    journal, June 2019

    • Deur, Alexandre; Brodsky, Stanley J.; de Téramond, Guy F.
    • Reports on Progress in Physics, Vol. 82, Issue 7
    • DOI: 10.1088/1361-6633/ab0b8f