Final Scientific Report for ER41087
The primary focus of the work was the development of methods for the nonperturbative solution of quantum chromodynamics (QCD) in a form that yields wave functions for the eigenstates, from which hadronic properties can be computed. The principal approach was to use a light-front Hamiltonian formulation. In light-front coordinates, t+z/c plays the role of time, with t the ordinary time, z a space direction, and c the speed of light. This leads to a relativistic formulation that retains useful characteristics of nonrelativistic treatments. A bound state of many constituents can be represented by wave functions that define probabilities for each possible arrangement of internal momenta. These functions satisfy integral equations that can be approximated numerically to yield a matrix representation. The matrix problem can be solved by iterative methods. The approximate wave functions can then be used to compute properties of the bound state. Methods have been developed for model theories and gauge theories, including quantum electrodynamics and theories that are supersymmetric. The work has required the development of new numerical algorithms and computer codes for singular integral equations and eigenvalue problems. A key aspect of the work is the construction of practical procedures for nonperturbative regularization and renormalization. Twomore »
- Publication Date:
- OSTI Identifier:
- 1091056
- Report Number(s):
- DOE-ER41087-15
- DOE Contract Number:
- FG02-98ER41087
- Resource Type:
- Technical Report
- Research Org:
- University of Minnesota-Duluth
- Sponsoring Org:
- USDOE; USDOE SC Office of High Energy Physics (SC-25)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS light-cone quantization; nonperturbative Hamiltonian methods; quantum electrodynamics; quantum chromodynamics
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