2,255 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
Asymptotic Quasinormal Frequencies of Different Spin Fields in Spherically Symmetric Black Holes
We consider the asymptotic quasinormal frequencies of various spin fields in
Schwarzschild and Reissner-Nordstr\"om black holes. In the Schwarzschild case,
the real part of the asymptotic frequency is ln3 for the spin 0 and the spin 2
fields, while for the spin 1/2, the spin 1, and the spin 3/2 fields it is zero.
For the non-extreme charged black holes, the spin 3/2 Rarita-Schwinger field
has the same asymptotic frequency as that of the integral spin fields. However,
the asymptotic frequency of the Dirac field is different, and its real part is
zero. For the extremal case, which is relevant to the supersymmetric
consideration, all the spin fields have the same asymptotic frequency, the real
part of which is zero. For the imaginary parts of the asymptotic frequencies,
it is interesting to see that it has a universal spacing of for all the
spin fields in the single-horizon cases of the Schwarzschild and the extreme
Reissner-Nordstr\"om black holes. The implications of these results to the
universality of the asymptotic quasinormal frequencies are discussed.Comment: Revtex, 17 pages, 3 eps figures; one table, some remarks and
references added to section I
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
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