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Quantum Chromodynamics and Other Field Theories on the Light Cone
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Quantum Chromodynamics and Other Field Theories on the Light Cone
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We discuss the light-cone quantization of gauge theories as a calculational tool for representing hadrons as QCD bound-states of relativistic quarks and gluons, and also as a novel method for simulating quantum field theory on a computer. The light-cone Fock state expansion of wavefunctions provides a precise definition of the parton model and a general calculus for hadronic matrix elements. We present several new applications of light-cone Fock methods, including calculations of exclusive weak decays of heavy hadrons, and intrinsic heavy-quark contributions to structure functions. Discretized light-cone quantization, is outlined and applied to several gauge theories. We also discuss the construction of the light-cone Fock basis, the structure of the light-cone vacuum, and outline the renormalization techniques required for solving gauge theories within the Hamiltonian formalism on the light cone.
Forward citations
Cited by 28 Pith papers
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Light-Front approach to $4d$ massless Higher-Spin interactions
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TMD factorization in diffractive heavy-quark production in photon-nucleus collisions
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Matching collinear factorization with color-glass condensate for inclusive and exclusive deep inelastic scattering
Collinear factorization amplitudes exactly reproduce the large-Q² expansion of CGC amplitudes for inclusive DIS, DVCS, and DVMP at the amplitude level.
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Quasi Parton Distribution Functions in Covariant Quark Models
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Light-front Hamiltonian jet evolution in the Glasma
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Radiative corrections in neutral-current (anti)neutrino elastic scattering at $\text{GeV}$ energies I: Nucleon targets
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Gluon GTMDs in the exclusive electroproduction of heavy-quark pairs
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Baryon Bethe-Salpeter Equation in Minkowski-Space QCD$_2$
In 1+1D QCD the baryon Bethe-Salpeter equation reduces to the Bars-Durgut equation under valence truncation and is solved numerically for the spectrum and parton distributions.
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Carroll fermions from null reduction: A case of good and bad fermions
Carrollian fermionic actions for electric and magnetic sectors are derived from a single Bargmann Dirac action by null reduction, with good and bad fermions as dynamical and constrained modes valid in any dimension.
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Generalized parton distributions of valence, sea, and gluon components of the proton
Using basis light-front quantization wave functions, the authors calculate GPDs for proton components at low resolution scale and obtain results qualitatively similar to but smaller than the GUMP1.0 global extraction.
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Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence
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Quantum simulating multi-particle processes in high energy nuclear physics: dijet production and color (de)coherence
A quantum-circuit framework maps partonic cross-sections for multi-particle QCD processes in media, benchmarked on dipole formation and antenna radiation at leading order.
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Transverse energy-momentum tensor distributions in polarized nucleons
The quantum phase-space formalism derives transverse energy-momentum tensor distributions in polarized nucleons and reproduces standard light-front distributions including bad components in the infinite-momentum frame.
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The Maximal Entanglement Limit in Statistical and High Energy Physics
Quantum systems reach a Maximal Entanglement Limit where entanglement geometry produces thermal reduced density matrices and probabilistic behavior in statistical and high-energy physics.
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Quantum entanglement between partons in a strongly coupled quantum field theory
In unquenched scalar Yukawa theory, parton entanglement entropy encodes quantum information that cannot be reduced to Shannon entropy of parton distributions.
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Relativistic energy-momentum tensor distributions in a polarized nucleon
Relativistic EMT distributions in polarized nucleons recover good and bad light-front components in the IMF after including polarization effects.
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Insight on confinement from the QCD effective charge
Assigning the imaginary poles of α_g1 to parton propagators produces long-distance damping e^{-Λ_s|x|/√2}|x|^{-5/2+d_a}, interpreting confinement as Green's-function suppression.
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Gluon mass and small-x dynamics in hadrons
Introduces a gluon mass and auxiliary scalar field to cancel small-x divergences in the front-form QCD Hamiltonian, yielding confinement for heavy quarks as the mass parameter is sent to zero.
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Light-front diagnostics in the 't Hooft model: I. Wave functions, EMT decomposition, and the diagonal GPD overlap
Analyzes diagonal GPD overlaps from light-front wave functions in the 't Hooft model, finding no linear b term in equal-mass second moments and a resonant b^4 ln^2(1/b) nonanalyticity at beta=1/2 that limits the diago...
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Chiral Structure and Selection Rules in Light-Front Nucleon-Pentaquark Mixing
Symmetry selection rules restrict nucleon-pentaquark mixing to 6 of 27 positive-parity states, with sigma and pi transitions adding incoherently to a total five-quark probability of 29%.
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On the Two $R$-Factors in the Small-$x$ Shockwave Formalism
Replacing the rapidity argument of the dipole amplitude with ln min{1/|x|, 1/|ξ|} and refining initial conditions for non-linear evolution can eliminate two R-factors in small-x shockwave calculations.
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Valence quark distribution of the pion inside a medium with finite baryon density: A Nambu--Jona-Lasinio model approach
The authors use the two-flavor NJL model to obtain medium-modified constituent quark masses and then compute the in-medium pion electromagnetic form factor, distribution amplitude, and parton distribution function via...
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Tachyonic AdS/QCD, Determining the Strong Running Coupling and \beta-function in both UV and IR Regions of AdS Space
A tachyonic AdS/QCD construction deforms the bulk geometry with a tachyon-dependent dielectric function to produce a unified running coupling from perturbative UV to nonperturbative IR regimes.
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Transverse energy-momentum tensor distributions in polarized nucleons
Transverse EMT distributions in polarized nucleons are derived in the quantum phase-space formalism; they reduce to standard light-front densities (including bad components) in the infinite-momentum frame.
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An Analysis on the Parton Distribution Functions of Heavy Mesons
Light-cone quark model PDFs for kaon and heavy mesons are evolved via NLO DGLAP to predict EIC structure functions and COMPASS Drell-Yan cross sections while showing heavy constituents dominate momentum fractions.
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Poincar\'e invariance and the Unruh effect
Acceleration has no effect on a causality-enforcing trivial vacuum, so the Unruh effect is absent and standard calculations omit a cancelling contribution from Lorentz transformations acting on the detector.
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