Pauli-Villars regularization in DLCQ

Abstract

Calculations in a (3+1)-dimensional model indicate that Pauli-Villars regularization can be combined with discrete light-cone quantization (DLCQ) to solve at least some field theories nonperturbatively. Discrete momentum states of Pauli-Villars particles are included in the Fock basis to automatically generate needed counterterms; the resultant increase in basis size is found acceptable. The Lanczos algorithm is used to extract the lowest massive eigenstate and eigenvalue of the light-cone Hamiltonian, with basis sizes ranging up to 10.5 million. Each Fock-sector wave function is computed in this way, and from these one can obtain values for various quantities, such as average multiplicities and average momenta of constituents, structure functions, and a form-factor slope.

Comments: 6 pages, 1 figure; LaTeX, aiproc.sty, epsf.sty; to appear in the proceedings of the Eleventh International Light-Cone Workshop on New Directions in QCD, Kyungju, Korea, June 20-25, 1999