Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-11-23
Mod.Phys.Lett. A9 (1994) 725-728
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, latex, UT-Komaba/93-23
Scientific paper
10.1142/S0217732394000538
A similarity transformation, which brings a particular class of the $N=1$ string to the $N=0$ one, is explicitly constructed. It enables us to give a simple proof for the argument recently proposed by Berkovits and Vafa. The $N=1$ BRST operator is turned into the direct sum of the corresponding $N=0$ BRST operator and that for an additional topological sector. As a result, the physical spectrum of these $N=1$ vacua is shown to be isomorphic to the tensor product of the $N=0$ spectrum and the topological sector which consists of only the vacuum. This transformation manifestly keeps the operator algebra.
Ishikawa Hiroshi
Kato Mariko
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