Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-05-20
Nucl.Phys. B413 (1994) 103-161
Physics
High Energy Physics
High Energy Physics - Theory
56 pages (LaTeX), McGill/93-01. (discussion clarified in places, but results unchanged)
Scientific paper
10.1016/0550-3213(94)90616-5
Two of the important unresolved issues concerning fractional superstrings have been the appearance of new massive sectors whose spacetime statistics properties are unclear, and the appearance of new types of ``internal projections'' which alter or deform the worldsheet conformal field theory in a highly non-trivial manner. In this paper we provide a systematic analysis of these two connected issues, and explicitly map out the effective post-projection worldsheet theories for each of the fractional-superstring sectors. In this way we determine their central charges, highest weights, fusion rules, and characters, and find that these theories are isomorphic to those of free worldsheet bosons and fermions. We also analyze the recently-discovered parafermionic ``twist current'' which has been shown to play an important role in reorganizing the fractional-superstring Fock space, and find that this current can be expressed directly in terms of the primary fields of the post-projection theory. This thereby enables us to deduce some of the spacetime statistics properties of the surviving states.
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