| 1. |
- Adawi, Tom, 1970, et al.
(författare)
-
Goldstone tensor modes
- 1998
-
Ingår i: J. High Energy Phys. 9902:001,1999.
-
Tidskriftsartikel (refereegranskat)abstract
- In the context of brane solutions of supergravity, we discuss a general method to introduce collective modes of any spin by exploiting a particular way of breaking symmetries. The method is applied to the D3, M2 and M5 branes and we derive explicit expressions for how the zero-modes enter the target space fields, verify normalisability in the transverse directions and derive the corresponding field equations on the brane. In particular, the method provides a clear understanding of scalar, spinor, and rank r tensorial Goldstone modes, chiral as well as non-chiral, and how they arise from the gravity, Rarita-Schwinger, and rank r+1 Kalb-Ramond tensor gauge fields, respectively. Some additional observations concerning the chiral tensor modes on the M5 brane are discussed.
|
|
| 2. |
- Adawi, Tom, 1970, et al.
(författare)
-
Superembeddings, nonlinear supersymmetry and five-branes
- 1997
-
Ingår i: Int.J.Mod.Phys.A13:4691-4716,1998.
-
Tidskriftsartikel (refereegranskat)abstract
- We examine general properties of superembeddings, i.e., embeddings of supermanifolds into supermanifolds. The connection between an embedding procedure and the method of non-linearly realised supersymmetry is clarified, and we demonstrate how the latter arises as a special case of the former. As an illustration, the super-5-brane in 7 dimensions, containing a self-dual 3-form world-volume field strength, is formulated in both languages, and provides an example of a model where the embedding condition does not suffice to put the theory on-shell.
|
|
| 3. |
|
|
| 4. |
- Berman, David S., et al.
(författare)
-
Holographic Noncommutativity
- 2000
-
Ingår i: J. High Energy Phys. ; 05, s. 002-
-
Tidskriftsartikel (refereegranskat)
|
|
| 5. |
- Cederwall, Martin, 1961, et al.
(författare)
-
D=3, N=8 conformal supergravity and the Dragon window
- 2011
-
Ingår i: Journal of High Energy Physics. - 1029-8479 .- 1126-6708. ; 2011:9
-
Tidskriftsartikel (refereegranskat)abstract
- We give a superspace description of D=3, N=8 supergravity. The formulation is off-shell in the sense that the equations of motion are not implied by the superspace constraints (but an action principle is not given). The multiplet structure is unconventional, which we connect to the existence of a "Dragon window", that is modules occurring in the supercurvature but not in the supertorsion. According to Dragon's theorem this cannot happen above three dimensions. We clarify the relevance of this window for going on the conformal shell, and discuss some aspects of coupling to conformal matter.
|
|
| 6. |
- Cederwall, Martin, 1961, et al.
(författare)
-
Finite tensor deformations of supergravity solitons
- 1998
-
Ingår i: J. High Energy Phys. 9902:003,1999.
-
Tidskriftsartikel (refereegranskat)abstract
- We consider brane solutions where the tensor degrees of freedom are excited. Explicit solutions to the full non-linear supergravity equations of motion are given for the M5 and D3 branes, corresponding to finite selfdual tensor or Born-Infeld field strengths. The solutions are BPS-saturated and half-supersymmetric. The resulting metric space-times are analysed.
|
|
| 7. |
- Cederwall, Martin, 1961, et al.
(författare)
-
Generalised 11-Dimensional Supergravity
- 2000
-
Ingår i: proceedings of the Triangle Meeting ``Non-perturbative Methods in Field and String Theory'', NORDITA, Copenhagen, June 19-22, 2000, and the International Conference ``Quantization, Gauge Theory and Strings'' in memory of Efim Fradkin, Moscow, June 5-10, 2000..
-
Konferensbidrag (refereegranskat)
|
|
| 8. |
|
|
| 9. |
- Cederwall, Martin, 1961, et al.
(författare)
-
(p,q) five-branes in nonzero B-field
- 1999
-
Ingår i: J. High Energy Phys. 0001:037,2000.
-
Tidskriftsartikel (refereegranskat)abstract
- We consider type IIB (p,q) 5-branes in constant non-zero background tensor potentials, or equivalently, with finite constant field strength on the brane. At linear level, zero-modes are introduced and the physical degrees of freedom are found to be parametrised by a real 2- or 4-form field strength on the brane. An exact, SL(2;Z)-covariant solution to the full non-linear supergravity equations is then constructed. The resulting metric space-times are analysed, with special emphasis on the limiting cases with maximal values of the tensor. The analysis provides an answer to how the various background tensor fields are related to Born-Infeld degrees of freedom and to non-commutativity parameters.
|
|
| 10. |
- Cederwall, Martin, 1961, et al.
(författare)
-
Supersymmetric Corrections to Eleven-Dimensional Supergravity
- 2004
-
Ingår i: J. High Energy Phys. 0505 (2005) 052.
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper we study eleven-dimensional supergravity in its most general form. This is done by implementing manifest supersymmetry (and Lorentz invariance) through the use of the geometric (torsion and curvature) superspace Bianchi identities. These identities are solved to linear order in a deformation parameter introduced via the dimension zero supertorsion given in its most general form. The theory so obtained is referred to as the deformed theory (to avoid the previously used term "off-shell"). An important by-product of this result is that any higher derivative correction to ordinary supergravity of the same dimension as R^4, but not necessarily containing it, derived e.g. from M-theory, must appear in a form compatible with the equations obtained here. Unfortunately we have not yet much to say about the explicit structure of these corrections in terms of the fields in the massless supermultiplet. Our results are potentially powerful since if the dimension zero torsion could be derived by other means, our reformulation of the Bianchi identities as a number of algebraic relations implies that the full theory would be known to first order in the deformation, including the dynamics. We mention briefly some methods to derive the information needed to obtain explicit answers both in the context of supergravity and ten-dimensional super-Yang-Mills where the situation is better understood. Other relevant aspects like spinorial cohomology, the role of the 3- and 6-form potentials and the connection of these results to M2 and M5 branes are also commented upon.
|
|
