Light-Front Quantum Chromodynamics

Details Light-Front Quantum Chromodynamics Light-Front Quantum Chromodynamics

1999-01-26

arxiv.org/abs/nucl-th/9901080v1

Physics

Nuclear Physics

Nuclear Theory

26 pages, 5 figures, to be published in Proceedings of the APCTP-RCNP Joint International School on Physics of Hadrons and QCD

Scientific paper

Light-front quantum chromodynamics may lead to an accurate constituent approximation for the low-energy properties of hadrons. This requires a cutoff that violates explicit gauge invariance and Lorentz covariance, leading to the calculation of a renormalized QCD hamiltonian using a similarity renormalization group. Renormalization repairs broken symmetries, and in light-front field theory it moves dynamical effects that usually require large numbers of partons to few-body effective interactions. This has been shown to work in QED through dominant contributions to the Lamb shift. In QCD logarithmic confinement arises at second order, and initial bound state calculations produce reasonable results.

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