Two-dimensional Wess-Zumino models at intermediate couplings

Journal Article · Sat Nov 01 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.095001· OSTI ID:21254634

Kaestner, Tobias; Bergner, Georg; Uhlmann, Sebastian; Wipf, Andreas; Wozar, Christian ^[1]

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1. Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universitaet Jena, Max-Wien-Platz 1, 07743 Jena (Germany)

We consider the two-dimensional N=(2,2) Wess-Zumino model with a cubic superpotential at weak and intermediate couplings. Refined algorithms allow for the extraction of reliable masses in a region where perturbation theory no longer applies. We scrutinize the Nicolai improvement program, which guarantees lattice supersymmetry, and compare the results for ordinary and nonstandard Wilson fermions with those for SLAC derivatives. It turns out that this improvement leads to better results for SLAC fermions but not for Wilson fermions. Furthermore, even without improvement terms the models with all three fermion species reproduce the correct values for the fermion masses in the continuum limit.

• OSTI ID: 21254634
• Journal Information: Physical Review. D, Particles Fields, Vol. 78, Issue 9; Other Information: DOI: 10.1103/PhysRevD.78.095001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
COMPARATIVE EVALUATIONS
COUPLING
FERMIONS
INTERMEDIATE COUPLING
MASS
PERTURBATION THEORY
POTENTIALS
SIMULATION
STANFORD LINEAR ACCELERATOR CENTER
SUPERSYMMETRY
TWO-DIMENSIONAL CALCULATIONS
WEAK-COUPLING MODEL