71 research outputs found
Towards a stringy extension of self-dual super Yang-Mills
Motivated by the search for a space-time supersymmetric extension of the N=2
string, we construct a particle model which, upon quantization, describes
(abelian) self-dual super Yang-Mills in 2+2 dimensions. The local symmetries of
the theory are shown to involve both world-line supersymmetry and kappa
symmetry.Comment: 9 pages, version to be published in PL
Intersecting M-branes and bound states
In this paper, we construct multi-scalar, multi-center -brane solutions in
toroidally compactified M-theory. We use these solutions to show that all
supersymmetric -branes can be viewed as bound states of certain basic
building blocks, namely -branes that preserve of the supersymmetry. We
also explore the M-theory interpretation of -branes in lower dimensions. We
show that all the supersymmetric -branes can be viewed as intersections of
M-branes or boosted M-branes in .Comment: Latex, 14 pages, no figures. References adde
Note on W3 Realizations of the Bosonic String
In order to investigate to what extent string theories are different vacua of
a general string theory (the ``universal string"), we discuss realizations of
the bosonic string as particular background of certain types of -strings.
Our discussions include linearized , non-critical , linearized
and critical realizations of the bosonic string.Comment: 9 pages, Late
Intersection Rules for Non-Extreme -Branes
We give a model-independent derivation of general intersecting rules for
non-extreme -branes in arbitrary dimensions . This is achieved by
directly solving bosonic field equations for supergravity coupled to a dilaton
and antisymmetric tensor fields with minimal ans\"{a}tze. We compare the
results with those in eleven-dimensional supergravity. Supersymmetry is
recovered in the extreme limit if the backgrounds are taken to be independent.
Consistency with non-supersymmetric solutions is also discussed. Finally the
general formulae for the ADM mass, entropy and Hawking temperature are given.Comment: Latex, 11 pages, a typo corrected, to appear in Phys. Lett.
Black-brane solution for A_3 algebra
Black p-brane solutions for a wide class of intersection rules and Ricci-flat
``internal'' spaces are considered. They are defined up to moduli functions H_s
obeying non-linear differential equations with certain boundary conditions
imposed. A new solution with intersections corresponding to the Lie algebra A_3
is obtained. The functions H_1, H_2 and H_3 for this solution are polynomials
of degree 3, 4 and 3, correspondingly. An example of A_3-solution with three
3-branes in 12-dimensional model (suggested by N. Khviengia et al) is
presented.Comment: 11 pages, Latex, to appear in Phys. Lett.
N=1 superstring in 2+2 dimensions
In this paper we construct a (2,2) dimensional string theory with manifest N=1 spacetime supersymmetry. We use Berkovits' approach of augmenting the spacetime supercoordinates by the conjugate momenta for the fermionic variables. The worldsheet symmetry algebra is a twisted and truncated ``small'' N=4 superconformal algebra. The realisation of the symmetry algebra is reducible with an infinite order of reducibility. We study the physical states of the theory by two different methods. In one of them, we identify a subset of irreducible constraints, which is by itself critical. We construct the BRST operator for the irreducible constraints, and study the cohomology and interactions. This method breaks the SO(2,2) spacetime symmetry of the original reducible theory. In another approach, we study the theory in a fully covariant manner, which involves the introduction of infinitely many ghosts for ghosts
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