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Chueng R. Ji



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.

He 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.

Selected Publications

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

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

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

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

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

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

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

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

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

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

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

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

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

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

"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"
Phys. Rev. D89, 033011 (2014) (with H.-M.Choi).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Book Publication

"Pedestrian Approach to Particle Physics"
Published by Asia Pacific Center for Theoretical Physics (ISBN 970-89-958822-0-7), 249 pages, 2007.

Conference Proceedings Publications

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

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

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

Honors & 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.

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