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7 papers · 1 filter
Recursive relations in the core Hopf algebra
Dirk Kreimer, Walter D. van Suijlekom
We study co-ideals in the core Hopf algebra underlying a quantum field theory.
The Path-Integral Approach to the N=2 Linear Sigma Model
E. N. Argyres, M. T. M. van Kessel, R. H. P. Kleiss
In QFT the effective potential is an important tool to study symmetry breaking phenomena. It is known that, in some theories, the canonical approach and the path-integral approach…
Path Integrals in Polar Field Variables in QFT
E. N. Argyres, C. G. Papadopoulos, R. H. P. Kleiss +1
We show how to transform a -dimensional Euclidean path integral in terms of two (Cartesian) fields to a path integral in terms of polar field variables. First we present a conje…
Free Fermion Orientifolds
Elias Kiritsis, Michael Lennek, Bert Schellekens
We investigate a class of orientifold models based on tensor products of 18 Ising models. Using the same search criteria as for the comparable case of Gepner model orientifolds we…
Non-supersymmetric Orientifolds of Gepner Models
B. Gato-Rivera, A. N. Schellekens
Starting from a previously collected set of tachyon-free closed strings, we search for N=2 minimal model orientifold spectra which contain the standard model and are free of tachyo…
Non-supersymmetric Tachyon-free Type-II and Type-I Closed Strings from RCFT
B. Gato-Rivera, A. N. Schellekens
We consider non-supersymmetric four-dimensional closed string theories constructed out of tensor products of N=2 minimal models. Generically such theories have closed string tachyo…