Monin, A.Shifman, M. A.2012-03-292012-03-292012-03-29201210.1016/j.nuclphysb.2012.01.015https://infoscience.epfl.ch/handle/20.500.14299/79100WOS:000300963600004The Cecotti-Fendley-Intriligator-Vafa (CFIV) index in two-dimensional N = (2,2) models is revisited. We address the problem of "elementary" (nontopological) excitations over a kink solution, in the one-kink sector (using the Wess-Zumino or Landau-Ginzburg models with two vacua as examples). In other words, we limit ourselves to the large-beta limit. The excitation spectrum over the BPS-saturated at the classical level kink is discretized through a large box with judiciously chosen boundary conditions. The boundary conditions are designed in such a way that half of supersymmetry is preserved as well as the BPS kink itself, and relevant zero modes. The excitation spectrum acquires a mass gap. All (discretized) excited states enter in four-dimensional multiplets (two bosonic states + two fermionic). Their contribution to ind(CFIV) vanishes level-by-level. The ground state contribution produces vertical bar ind(CFIV)vertical bar = 1. (C) 2012 Elsevier B.V. All rights reserved.Dynamical Supersymmetry Breakingtext::journal::journal article::research article