15 research outputs found
Kappa-symmetric deformations of M5-brane dynamics
We calculate the first supersymmetric and kappa-symmetric derivative
deformation of the M5-brane worldvolume theory in a flat eleven-dimensional
background. By applying cohomological techniques we obtain a deformation of the
standard constraint of the superembedding formalism. The first possible
deformation of the constraint and hence the equations of motion arises at cubic
order in fields and fourth order in a fundamental length scale . The
deformation is unique up to this order. In particular this rules out any
induced Einstein-Hilbert terms on the worldvolume. We explicitly calculate
corrections to the equations of motion for the tensor gauge supermultiplet.Comment: 17 pages. Additional comments in section
SL(2,R)-invariant IIB Brane Actions
We give a universal SL(2,R)-invariant expression for all IIB p-brane actions
with p=-1,1,3,5,7,9. The Wess-Zumino terms in the brane actions are determined
by requiring (i) target space gauge invariance and (ii) the presence of a
single Born-Infeld vector. We find that for p=7 (p=9) brane actions with these
properties only exist for orbits that contain the standard D7-brane (D9-brane).
We comment about the actions for the other orbits.Comment: 15 pages, additional references and remarks in subsection on
3-branes, accepted for publication in JHE
IIA Ten-forms and the Gauge Algebras of Maximal Supergravity Theories
We show that IIA supergravity can be extended with two independent 10-form
potentials. These give rise to a single BPS IIA 9-brane. We investigate the
bosonic gauge algebra of both IIA and IIB supergravity in the presence of
10-form potentials and point out an intriguing relation with the symmetry
algebra , which has been conjectured to be the underlying symmetry of
string theory/M-theory.Comment: 18 pages, section on IIA 9-branes added, references added; version to
be publishe
Kappa-symmetric SL(2,R) covariant D-brane actions
A superspace formulation of IIB supergravity which includes the field
strengths of the duals of the usual physical one, three and five-form field
strengths as well as the eleven-form field strength is given. The
superembedding formalism is used to construct kappa-symmetric SL(2,R) covariant
D-brane actions in an arbitrary supergravity background.Comment: 20 pages. Minor clarification in text. References adde
Supersymmetric Born-Infeld from the D9-brane
Using the superembedding approach, the full supersymmetric effective field
theory of the D9-brane, super Born-Infeld theory, is fixed by the so called
-constraint. The odd-odd components of the theory's super field
strength, , are implied by this constraint. Given , the super Bianchi identities imply the theory's equations of motion.
We calculate up to order 5 in fields, corresponding to order
6 in fields in the Lagrangian.Comment: 15 pages, references adde
IIB supergravity revisited
We show in the SU(1, 1)-covariant formulation that IIB supergravity allows the introduction of a doublet and a quadruplet of ten-form potentials. The Ramond-Ramond ten-form potential which is associated with the SO(32) type-I superstring is in the quadruplet. Our results are consistent with a recently proposed E11 symmetry underlying string theory.
For the reader’s convenience we present the full supersymmetry and gauge transformations of all fields both in the manifestly SU(1, 1) covariant Einstein frame and in the real U(1) gauge fixed string frame.
IIB nine-branes
We calculate the tensions of all half-supersymmetric nine-branes in IIB string theory. In particular, we point out the existence of a solitonic IIB nine-brane. We find that the D9-brane and its duality transformations parametrize a two-dimensional surface in a four-dimensional space.