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Think and Do The Extraordinary


Professor Ji received his PhD in 1982 from Korea Advanced Institute of Science and Technology (KAIST) after getting MS in KAIST, 1978, and BS in Seoul National University, 1976, respectively. He joined the theory group of the Stanford Linear Accelerator Center (SLAC) in 1982. In 1984, he became a postdoctoral fellow at Department of Physics, Stanford University and was appointed as a research associate at Brooklyn College of the City University of New York in 1986. He joined the faculty of North Carolina State University in 1987. At NCSU, he was an assistant professor for 1987-1992, an associate professor for 1992-1997 and has been a professor since 1997.

Offices Held

  • 2010-present: Chair, International Light Cone Advisory Committee
  • 2009-2011: 28th President, Association of Korean Physicists in America
  • 2009-2010: 38th President, Korean-American Scientists and Engineers Association


  • 1997-present :Professor, Department of Physics, North Carolina State University
  • 2013-2015 :Director of Graduate Program, Department of Physics, North Carolina State University
  • 1992-1997 :Associate Professor, Department of Physics, North Carolina State University
  • 1993, Fall; 2005, Spring :Visiting Professor, School of Physics, Seoul National University
  • 1987-1992 :Assistant Professor, Department of Physics, North Carolina State University
  • 1986-1987 :Research Associate, Department of Physics, Brooklyn College of the City University of New York
  • 1984-1986 :Postdoctoral Research Affiliate, Department of Physics, Stanford University
  • 1982-1984 :Visiting Scholar, Stanford Linear Accelerator Center



Research Description

Professor Ji developed a relativistic quark model motivated by the quantum chromodynamics (QCD) to describe the hadron structure and spectrum. He Pioneered the idea of connecting the instant form dynamics and the light-front dynamics and contributed to utilizing the light cone in solving relativistic bound state and scattering problems. He has also made chiral effective theory calculations to study the long distance scale QCD phenomenology as well as perturbative QCD computations of the nucleon, meson and deuteron form factors to understand the structures of hadron and a few hadron systems at short distance scale. Other research accomplishments include an application of nuclear and particle physics to astrophysics and cosmology involving neutron star and dark matter.  

Honors and Awards

  • Fellow of American Physical Society, 2011.
  • Outstanding Referee of American Physical Society, 2008.
  • Plaque of Appreciation from the North Carolina Chapter of Korean-American Scientists and Engineers Association in Commemoration of the Tenth Anniversary of Technical Symposium, 1999.
  • Dirac Scholarship Award, The Third Conference on the Intersections between Particle and Nuclear Physics, 1988.
  • Korea Science and Engineering Foundation fellowship, 1982.

Selected Publications

Beam spin asymmetry in the electroproduction of a pseudoscalar meson or a scalar meson off the scalar target
C. Ji, H. Choi, A. Lundeen, B. Bakker
PHYSICAL REVIEW D, 99(11), (2019), 6008, doi:10.1103/PhysRevD.99.116008

Color-suppression of non-planar diagrams in bosonic bound states
with J.H.A.Nogueira, E.Ydrefors and T.Frederico
Phys. Lett., B777, (2018), 207

Spacelike and timelike form factors for the (π0, η, η' → γ* γ) transitions in the light-front quark model
with H.-M. Choi and H.-Y. Ryu
Phys. Rev. D96, no. 5, (2017), 056008

Dark matter phenomenology of high speed galaxy cluster collisions
with Y. Mishchenko
Eur. Phys. J. C77, no. 8, (2017), 505

Matter equation of state in general relativity
with H. C. Kim
Phys. Rev. D95, no. 8, (2017), 084045

Two-particle Twist-3 Distribution Amplitudes of Pion and Kaon in the Light-Front Quark Model
with H.-M. Choi
Phys. Rev. D95, no. 5, (2017), 056002

The -meson time-like form factors in sub-leading pQCD
with J. P. B. C. de Melo and T. Frederico
Phys. Lett., B763, (2016), 87

Strange quark asymmetry in the proton in chiral e ective theory
with X. G. Wang, W. Melnitchouk, Y. Salamu, A. W. Thomas and P. Wang
Phys. Rev. D94, no. 9, (2016), 094035

Constraints on s 􀀀 s asymmetry of the proton in chiral e ective theory
with X. G. Wang, W. Melnitchouk, Y. Salamu, A. W. Thomas and P. Wang)
Phys. Lett., B762, (2016), 52

Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
with J.-R.McKenney, N.Sato and W.Melnitchouk
Phys. Rev., D93, (2016), 054011

Interpolating Helicity Spinors Between the Instant Form and the Light-front Form
with Z.Li and M.An
Phys. Rev., D92, (2015), 105014

Variational analysis of mass spectra and decay constants for ground state pseudoscalar and vector mesons in the light-front quark model
with H.-M.Choi, Z.Li and H.-Y. Ryu
Phys. Rev., C92, (2015), 055203

d̄ - ū asymmetry in the proton in chiral effective theory
with Y. Salamu, W. Melnitchouk and P.Wang
Phys. Rev. Lett., 114, (2015), 122001

The Electromagnetic Gauge Field Interpolation between the Instant Form and the Front Form of the Hamiltonian Dynamics
with Z.Li and A.Suzuki
Phys. Rev., D91, (2015), 065020

Consistency of the Light-Front Quark Model with the Chiral Symmetry in the Pseudoscalar Meson Analysis
with H.-M.Choi
Phys. Rev., D91, (2015), 014018

Self-consistent covariant description of vector meson decay constants and chirality-even quark-antiquark distribution amplitudes up to twist-3 in the light-front quark model
with H.-M.Choi
Phys. Rev., D89, (2014), 033011

Nuclear chromodynamics: Novel nuclear phenomena predicted by QCD
with B.Bakker
Prog. Part. Nucl. Phys., 74, (2014), 1

Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling
with W.Melnitchouk and A.W.Thomas
Phys. Rev., D88, (2013), 076005

Comment on 'Taming the pion cloud of the nucleon'
with W.Melnitchouk and A.W.Thomas
Phys. Rev. Lett., 110, (2013), 179101

Conceptual Issues Concerning Generalized Parton Distributions
with B.Bakker
Int. J. Mod. Phys., E22, (2013), 1330002

Ideas of Four-Fermion Operators in Electromagnetic Form Factor Calculations
with B.Bakker,H.-M.Choi and A.Suzuki
Phys. Rev., D87, (2013), 093004

Pion Momentum Distributions in the Nucleon in Chiral Effective Theory
with M. Burkardt, K.S. Hendricks, W. Melnitchouk and A.W. Thomas
Phys. Rev., D87, (2013), 056009

Interpolating Scattering Amplitudes between Instant Form and Front Form of Relativistic Dynamics
with A. Suzuki
Phys. Rev., D87, (2013), 065015

Light-Front Dynamic Analysis of Bound States in Scalar Field Model
with Y. Tokunaga
Phys. Rev., D86, (2012), 054011

Spin Filter in Deeply Virtual Compton Scattering Amplitudes
with B.Bakker
Phys. Rev., D83, (2011), 091502(R)

Light-Front Dynamic Analysis of Transition Form Factors in the Process of P → Vℓν
with H.-M.Choi
Nucl. Phys., A856, (2011), 95

Light-Front Zero-Mode Contribution to the Tensor Form Factors for the Exclusive Rare PV+- Decays
with H.-M.Choi
Phys. Lett., B696, (2011), 518

On Flavor Conservation in Weak Interaction Decays involving Mixed Neutrinos
with M.Blasone, A.Capolupo and G.Vitiello
Int. J. Mod. Phys., A25, (2010), 4179

Nonleptonic Two-Body Decays of the Bc Meson in Light-Front Quark Model and QCD Factorization Approach
with H.-M.Choi
Phys. Rev., D80, (2009), 114003

Equivalence of pion loops in equal-time and light-front dynamics
with W. Melnitchouk and A.W.Thomas
Phys. Rev., D80, (2009), arXiv:0906.3497 [nucl-th]

Semileptonic and radiative decays of the Βc meson in light-front quark model
with H.-M.Choi
Phys. Rev., D80, (2009), arXiv:0903.0455 [hep-ph]

Conformal Symmetry and Pion Form Factor: Space- and Time-like Region
with H.-M.Choi
Phys. Rev., D77, (2008), 113004

Perturbative QCD analysis of exclusive J / ψ + ηc production in e+e annihilation
with H.-M.Choi
Phys. Rev., D76, (2007), 094010

Zero-Mode Contribution in Nucleon-Delta Transition
with J.Yu, T.Wang, and B.Q.Ma
Phys. Rev., D76, (2007), 074009

The Box Diagram in Yukawa Theory
with B.Bakker and J.Boomsma
Phys. Rev., D75, (2007), 065010

Distribution amplitudes and decay constants for (π, Κ, ρ, Κ*) mesons in light-front quark model
with H.-M.Choi
Phys. Rev., D75, (2007), 034019

Canonical Transformation and Duality in 1+1 Dimensional φ4 and φ6 Theory
with J.-I.Kim, D.-P.Min and A. Vinnikov
J. Korean Phys. Soc., 49, (2006), 2253

Conformal symmetry and pion form factor: Soft and hard contributions
with H.-M.Choi
Phys. Rev., D74, (2006), 093010

PQCD analysis of exclusive e+e → D[s]+D[s] cross section at √s=10.6 GeV
with H.-M.Choi
Phys. Rev., D73, (2006), 114020

Higher Fock State Contributions to the Generalized Parton Distribution of Pion
with Y.Mishchenko and A.Radyushkin
Phys. Rev., D73, (2006), 114013

Real and Virtual Nucleon Compton Scattering in the Perturbative Limit
with R.Thomson and A.Pang
Phys. Rev., D73, (2006), 054023

Light-Front Wavefunction Dependence of Quark Recombination
with B.Hong and D.-P.Min
Phys. Rev., C73, (2006), 054901

Instanton-inspired Model of QCD Phase Transition and Bubble Dynamics
with G.Kang and J.Lee
Phys. Rev., D73, (2006), 085003

The Parity Determination of the Pentaquark &Theta+ from Photoproduction near Threshold
with B.G.Yu and T.K.Choi
J. Phys., G32, (2006), 387

[Book Publication] Pedestrian Approach to Particle Physics

Published by Asia Pacific Center for Theoretical Physics, (ISBN 970-89-958822-0-7), (2007), 249 pages

Proceedings of Light-Cone 2014: Theory and Experiment for Hadrons on the Light-Front
published in Few Body Syst. 56, Nos. 6-9, (2004), pp. 241-644

New Directions in Quantum Chromodynamics
C.-R.Ji(Ed.) and D.-P.Min(Ed.)
AIP Conference Proceedings, 494, (), 543 pages

QCD, Lightcone Physics and Hadron Phenomenology
C.-R.Ji(Ed.) and D.-P.Min(Ed.)
Published by World Scientific Pub. Co., Singapore, 273 pages, (1998)