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13 papers · 1 filter
Summing Planar Open String Loops on a Worldsheet Lattice with Dirichlet and Neumann Boundaries
Charles B. Thorn
We extend the lightcone worldsheet lattice approach to string theory, proposed in 1977 by Giles and me, to allow for coincident D-branes. We find a convenient lattice representatio…
Nonabelian D-branes, Open Strings, and Gauge Theory
Charles B. Thorn
There is a subtle difference between the open string dynamics determined by the original dual resonance models and that determined by D-brane constructions within critical closed s…
The Flavor Group Delta(6n^2)
J. A. Escobar, Christoph Luhn
Many non-Abelian finite subgroups of SU (3) have been used to explain the flavor structure of the Standard Model. In order to systematize and classify successful models, a detailed…
Divergence-free Nonrenormalizable Models
John R. Klauder
A natural procedure is introduced to replace the traditional, perturbatively generated counter terms to yield a formulation of covariant, self-interacting, nonrenormalizable scalar…
Classical Worldsheets for String Scattering on Flat and AdS Spacetime
Charles M. Sommerfield, Charles B. Thorn
We present a study of the worldsheets that describe the classical limit of various string scattering processes. Our main focus is on string scattering in AdS spacetime because of i…
E8(8) in Light Cone Superspace
Lars Brink, Sung-Soo Kim, Pierre Ramond
We derive the non-linear action of E8(8) on the constrained chiral superfield in the light-cone superspace with eight complex Grassmann variables. We construct (to lowest order in…