DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Unified Description of Polarized and Unpolarized Quark Distributions in the Proton

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [5];  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Duke Univ., Durham, NC (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of Costa Rica, San Pedro (Costa Rica)
  4. Heidelberg Univ. (Germany). Inst. for Theoretische Physik
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)

We propose a unified new approach to describe polarized and unpolarized quark distributions in the proton based on the gauge-gravity correspondence, light-front holography, and the generalized Veneziano model. We find that the spin-dependent quark distributions are uniquely determined in terms of the unpolarized distributions by chirality separation without the introduction of additional free parameters. The predictions are consistent with existing experimental data and agree with perturbative QCD constraints at large longitudinal momentum x. In particular, we predict the sign reversal of the polarized down-quark distribution in the proton at x=0.8±0.03, a key property of nucleon substructure which will be tested very soon in upcoming experiments.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Natural Science Foundation of China (NSFC)
Contributing Organization:
HLFHS Collaboration
Grant/Contract Number:
AC02-76SF00515; AC05-06OR23177; FG02-03ER41231; 11775118
OSTI ID:
1601720
Alternate ID(s):
OSTI ID: 1602424; OSTI ID: 1633965
Report Number(s):
JLAB-THY-19-3057; DOE-OR-23177-4786; SLAC-PUB-17477; PRLTAO; TRN: US2103994
Journal Information:
Physical Review Letters, Vol. 124, Issue 8; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (70)

Threefold complementary approach to holographic QCD journal February 2014
Extraction of spin-dependent parton densities and their uncertainties journal August 2009
Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions journal August 2007
First Simultaneous Extraction of Spin-Dependent Parton Distributions and Fragmentation Functions from a Global QCD Analysis journal September 2017
Generalized parton distributions for the proton in AdS/QCD journal October 2013
Nucleon structure in a light-front quark model consistent with quark counting rules and data journal March 2015
Hadronic Spectra and Light-Front Wave Functions in Holographic QCD journal May 2006
GPDs at non-zero skewness in ADS/QCD model journal August 2017
Hadronic Spectrum of a Holographic Dual of QCD journal May 2005
Universality of Generalized Parton Distributions in Light-Front Holographic QCD journal May 2018
Flavor Decomposition of the Sea-Quark Helicity Distributions in the Nucleon from Semiinclusive Deep Inelastic Scattering journal January 2004
The scaling law for deep inelastic scattering in a few Veneziano-like amplitude journal June 1970
Precision Measurement of the Neutron Spin Asymmetry A 1 n and Spin-Flavor Decomposition in the Valence Quark Region journal January 2004
Nucleon parton distributions in a light-front quark model journal February 2017
Covariant extension of the GPD overlap representation at low Fock states journal December 2017
Nucleon spin structure at very high x journal November 2013
Light-front hadron dynamics and AdS/CFT correspondence journal March 2004
Erratum: Light-front quark model consistent with Drell-Yan-West duality and quark counting rules [Phys. Rev. D 89 , 054033 (2014)] journal July 2015
Small- and large- x nucleon spin structure from a global QCD analysis of polarized parton distribution functions journal March 2015
Review of Particle Physics journal August 2018
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
Generalized parton distributions in an AdS/QCD hard-wall model journal May 2012
QCD constraints on the shape of polarized quark and gluon distributions journal May 1995
A first unbiased global determination of polarized PDFs and their uncertainties journal October 2014
Charge and longitudinal momentum distributions in transverse coordinate space journal October 2016
Light front quark-diquark model for the nucleons journal November 2016
Transverse structure of a proton in a light-front quark-diquark model journal April 2017
A statistical approach for polarized parton distributions journal April 2002
The effective cross section for double parton scattering within a holographic AdS/QCD approach journal May 2017
Universal effective hadron dynamics from superconformal algebra journal August 2016
Leading twist generalized parton distributions and spin densities in a proton journal July 2017
Superconformal baryon-meson symmetry and light-front holographic QCD journal April 2015
A new evaluation of polarized parton densities in the nucleon journal April 2002
Determination of ${{\rm{\Lambda }}}_{\overline{{\rm{MS}}}}$ at five loops from holographic QCD journal September 2017
The transverse structure of the pion in momentum space inspired by the AdS/QCD correspondence journal August 2017
Constraints on spin-dependent parton distributions at large x from global QCD analysis journal November 2014
Helicity-dependent generalized parton distributions for nonzero skewness journal September 2017
Nonstrong amplitudes in a veneziano-type model journal September 1969
Quark helicity distributions in the nucleon for up, down, and strange quarks from semi-inclusive deep-inelastic scattering journal January 2005
Construction of a crossing-simmetric, Regge-behaved amplitude for linearly rising trajectories journal September 1968
Proton and neutron electromagnetic form factors and uncertainties journal February 2018
Global Analysis of Helicity Parton Densities and their Uncertainties journal August 2008
Chiral-odd generalized parton distributions for proton in a light-front quark-diquark model journal October 2015
Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region journal December 2004
Baryon spectrum from superconformal quantum mechanics and its light-front holographic embedding journal February 2015
Light-Front Holography: A First Approximation to QCD journal February 2009
The spin structure of the nucleon journal April 2013
Precision measurements of A 1 n in the deep inelastic regime journal May 2015
Generalized parton distributions in AdS/QCD journal February 2011
The spin structure of the nucleon journal June 2019
Pion and Nucleon Structure Functions near x = 1 journal November 1975
Valence-quark distribution functions in the kaon and pion journal April 2016
Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models journal December 2018
Quark helicity distributions from longitudinal spin asymmetries in muon–proton and muon–deuteron scattering journal October 2010
Hadronic momentum densities in the transverse plane journal October 2008
AdS/CFT and Light-Front QCD conference January 2012
Quark Wigner distributions and spin-spin correlations journal April 2017
Analysis of nucleon electromagnetic form factors from light-front holographic QCD: The spacelike region journal January 2017
Hard-gluon evolution of nucleon generalized parton distributions in soft-wall AdS/QCD model journal April 2015
Measurement of the x- and Q2-dependence of the asymmetry A1 on the nucleon journal September 2006
The scaling law for deep inelastic scattering in a few Veneziano-like amplitude journal June 1970
The effective cross section for double parton scattering within a holographic AdS/QCD approach journal May 2017
The transverse structure of the pion in momentum space inspired by the AdS/QCD correspondence journal August 2017
Proton and neutron electromagnetic form factors and uncertainties journal February 2018
Constraints on spin-dependent parton distributions at large x from global QCD analysis text January 2014
Covariant Extension of the GPD overlap representation at low Fock states text January 2017
Light-Front Hadron Dynamics and AdS/CFT Correspondence text January 2003
Hadronic Spectrum of a Holographic Dual of QCD text January 2005
Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region. collection January 2005

Cited By (2)

Proton structure from a light-front Hamiltonian text January 2019
Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD text January 2020