Topic
Light front quantization
About: Light front quantization is a research topic. Over the lifetime, 131 publications have been published within this topic receiving 5020 citations. The topic is also known as: light front quantization & light-front quantisation.
Papers published on a yearly basis
Papers
TL;DR: In this article, a systematic analysis in perturbative quantum chromodynamics (QCD) of large-momentum-transfer exclusive processes is presented, where the scaling behavior, angular dependence, helicity structure, and normalization of elastic and inelastic form factors and large-angle exclusive scattering amplitudes for hadrons and photons are given.
Abstract: We present a systematic analysis in perturbative quantum chromodynamics (QCD) of large-momentum-transfer exclusive processes. Predictions are given for the scaling behavior, angular dependence, helicity structure, and normalization of elastic and inelastic form factors and large-angle exclusive scattering amplitudes for hadrons and photons. We prove that these reactions are dominated by quark and gluon subprocesses at short distances, and thus that the dimensional-counting rules for the power-law falloff of these amplitudes with momentum transfer are rigorous predictions of QCD, modulo calculable logarithmic corrections from the behavior of the hadronic wave functions at short distances. These anomalous-dimension corrections are determined by evolution equations for process-independent meson and baryon "distribution amplitudes" $\ensuremath{\varphi}({x}_{i}, Q)$ which control the valence-quark distributions in high-momentum-transfer exclusive reactions. The analysis can be carried out systematically in powers of ${\ensuremath{\alpha}}_{s}({Q}^{2})$, the QCD running coupling constant. Although the calculations are most conveniently carried out using light-cone perturbation theory and the light-cone gauge, we also present a gauge-independent analysis and relate the distribution amplitude to a gauge-invariant Bethe-Salpeter amplitude.
3,283 citations
TL;DR: In this article, it was shown that there is an exact correspondence between the fth-dimensional coordinate of anti-de Sitter space z and a specic light-front impact variable which measures the separation of the quark and gluonic constituents within the hadron in ordinary space-time.
Abstract: at large distances. The AdS/CFT correspondence also provides insights into the inherently non-perturbative aspects of QCD such as the orbital and radial spectra of hadrons and the form of hadronic wavefunctions. In particular, we show that there is an exact correspondence between the fth-dimensional coordinate of anti{de Sitter (AdS) space z and a specic light-front impact variable which measures the separation of the quark and gluonic constituents within the hadron in ordinary space-time. This connection allows one to compute the analytic form of the frame-independent light-front wavefunctions of mesons and baryons, the fundamental entities which encode hadron properties and which allow the computation of decay constants, form factors and other exclusive scattering amplitudes. Relativistic light-front equations in ordinary space-time are found which reproduce the results obtained using the fth-dimensional theory. As specic examples we compute the pion coupling constant f , the pion charge radius r 2 and examine the propagation of the electromagnetic current in AdS space, which determines the space and time-like behavior of the pion form factor and the pole of the meson.
539 citations
TL;DR: In this paper, a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a conformal action and its embedding in higher-dimensional anti-de Sitter space is presented.
537 citations
TL;DR: Light-Front quantization is the most promising and physical tool to study deep inelastic scattering on the basis of quark gluon degrees of freedom as discussed by the authors, which allows for a description of hadrons that stays close to intuition.
Abstract: An introductory overview on Light-Front quantization, with some emphasis on recent achievements, is given. Light-Front quantization is the most promising and physical tool to study deep inelastic scattering on the basis of quark gluon degrees of freedom. The simplified vacuum structure (nontrivial vacuum effects can only appear in zero-mode degrees of freedom) and the physical basis allows for a description of hadrons that stays close to intuition. Recent progress has ben made in understanding the connection between effective LF Hamiltonians and nontrivial vacuum condesates. Discrete Light-Cone Quantization, the transverse lattice and Light-Front Tamm-Dancoff (in combination with renormalization group techniques) are the main tools for exploring LF-Hamiltonians nonperturbatively.
150 citations
TL;DR: In this article, Canonical Quantization, Perturbative Renormalization, and Nonperturbative Calculations are investigated in the context of quantum chromodynamics (QCD). But, the complexity of this theory has slowed any progress in this direction considerably.
Abstract: More than twenty years after quantum chromodynamics (QCD) was introduced as a microscopic theory of strong interactions, very little is known about its solutions. At least in principle, it should be possible to describe the interaction of nucleons with external probes using quark and gluon degrees of freedom on the basis of QCD. So far, however, the extreme complexity of this theory has slowed any progress in this direction considerably. To investigate QCD further this paper investigates the following topics: Canonical Quantization; The Light-Front Vacuum; Perturbative Renormalization; and Nonperturbative Calculations.
116 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 7 |
| 2020 | 17 |
| 2019 | 6 |
| 2018 | 5 |
| 2017 | 5 |
| 2016 | 6 |