出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study and simulateN = 2 supersymmetricWess-Zumino models in one and two dimensions.
For any choice of the lattice derivative, the theories can be made manifestly supersymmetric by
adding appropriate improvement terms corresponding to discretizations of surface integrals. In
particular, we check that fermionic and bosonic masses coincide and the unbroken Ward identities
are fulfilled to high accuracy. Equally good results for the effective masses can be obtained
in a model with the SLAC derivative (even without improvement terms). In two dimensions we
introduce a non-standard Wilson term in such a way that the discretization errors of the kinetic
terms are only of order O(a2). Masses extracted from the corresponding manifestly supersymmetric
model prove to approach their continuum values much quicker than those from a model
containing the standard Wilson term. Again, a comparable enhancement can be achieved in a
theory using the SLAC derivative.
