23 research outputs found
On the Hyperbolic Structure of Moduli Spaces With 16 SUSYs
We study the asymptotic limits of the heterotic string theories compactified
on tori. We find a bilinear form uniquely determined by dualities which becomes
Lorentzian in the case of one spacetime dimension. For the case of the SO(32)
theory, the limiting descriptions include SO(32) heterotic strings, type I,
type IA and other T-duals, M-theory on K3, type IIA theory on K3 and type IIB
theory on K3 and possibly new limits not understood yet.Comment: JHEP LaTeX, 19 pages, 1 eps-figure, report number adde
Equations of the (2,0) Theory and Knitted Fivebranes
We study non-linear corrections to the low-energy description of the (2,0)
theory. We argue for the existence of a topological correction term similar to
the C3 wedge X8(R) in M-theory. This term can be traced to a classical effect
in supergravity and to a one-loop diagram of the effective 4+1D Super
Yang-Mills. We study other terms which are related to it by supersymmetry and
discuss the requirements on the subleading correction terms from
M(atrix)-theory. We also speculate on a possible fundamental formulation of the
theory.Comment: JHEP LaTeX, 34 pages, few typos correcte
Heterotic Strings from Matrices
We propose a nonperturbative definition of heterotic string theory on
arbitrary multidimensional tori.Comment: plain LaTeX, 14 page
A nonsupersymmetric matrix orbifold
We construct the matrix description for a twisted version of the IIA string
theory on S^1 with fermions antiperiodic around a spatial circle. The result is
a 2+1-dimensional U(N) x U(N) nonsupersymmetric Yang-Mills theory with
fermionic matter transforming in the (N,Nbar). The two U(N)'s are exchanged if
one goes around a twisted circle of the worldvolume. Relations with Type 0
theories are explored and we find Type 0 matrix string limits of our gauge
theory. We argue however that most of these results are falsified by the
absence of SUSY nonrenormalization theorems and that the models do not in fact
have a sensible Lorentz invariant space time interpretation.Comment: JHEP LaTeX, 22 page