| 1. |
- Adawi, Tom, 1970, et al.
(författare)
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Goldstone tensor modes
- 1998
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Ingår i: J. High Energy Phys. 9902:001,1999.
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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.
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| 2. |
- Adawi, Tom, 1970, et al.
(författare)
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Superembeddings, nonlinear supersymmetry and five-branes
- 1997
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Ingår i: Int.J.Mod.Phys.A13:4691-4716,1998.
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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.
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| 3. |
- Cederwall, Martin, 1961, et al.
(författare)
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An action for the superfive-brane in D=11 supergravity
- 1997
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Ingår i: J. High Energy Phys. 9804:007,1998.
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Tidskriftsartikel (refereegranskat)abstract
- An alternative path is taken for deriving an action for the supersymmetric 5-brane in 11 dimensions. Selfduality does not follow from the action, but is consistent with the equations of motion for arbitrary supergravity backgrounds. The action involves a 2-form as well as a 5-form world-volume potential; inclusion of the latter makes the action, as well as the non-linear selfduality relation for the 3-form field strength, polynomial. The requirement of invariance under kappa-transformations determines the form of the selfduality relation, as well as the action. The formulation is shown to be equivalent to earlier formulations of 5-brane dynamics.
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| 4. |
- Cederwall, Martin, 1961
(författare)
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Aspects of D-brane actions
- 1996
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Ingår i: Nucl.Phys.Proc.Suppl.56B:61-69,1997.
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Konferensbidrag (refereegranskat)abstract
- A couple of issues concerning the effective dynamics of D-branes in string theory are discussed. Primarily, I am concerned with linearization of the actions by introduction of non-propagating fields and a full super- and kappa-symmetric description of D-branes.
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| 5. |
- Cederwall, Martin, 1961
(författare)
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Boundaries of eleven-dimensional membranes
- 1997
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Ingår i: Mod.Phys.Lett.A12:2641-2645,1997.
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Tidskriftsartikel (refereegranskat)abstract
- The action for an 11-dimensional supermembrane contains a chiral Wess-Zumino-Witten model coupling to the E8 super-Yang-Mills theory on the end-of-the-world 9-brane. It is demonstrated that this boundary string theory is dictated both by gauge invariance and by kappa-symmetry.
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| 6. |
- Cederwall, Martin, 1961, et al.
(författare)
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Deformations in closed string theory - canonical formulation and regularization
- 1995
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Ingår i: Nucl.Phys. B464 (1996) 117.
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Tidskriftsartikel (refereegranskat)abstract
- We study deformations of closed string theory by primary fields of conformal weight (1,1), using conformal techniques on the complex plane. A canonical surface integral formalism for computing commutators in a non-holomorphic theory is constructed, and explicit formulae for deformations of operators are given. We identify the unique regularization of the arising divergences that respects conformal invariance, and consider the corresponding parallel transport. The associated connection is metric compatible and carries no curvature.
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| 7. |
- Cederwall, Martin, 1961, et al.
(författare)
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Finite tensor deformations of supergravity solitons
- 1998
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Ingår i: J. High Energy Phys. 9902:003,1999.
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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.
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| 8. |
- Cederwall, Martin, 1961, et al.
(författare)
-
Low energy dynamics of monopoles in N=2 SYM with matter
- 1995
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Ingår i: Mod.Phys.Lett. A11 (1996) 367.
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Tidskriftsartikel (refereegranskat)abstract
- We derive, for N=2 super-Yang-Mills with gauge group SU(2) and massless matter, the supersymmetric quantum mechanical models describing the time evolution of multi-monopole configurations in the low energy approximation. This is a first step towards identifying the solitonic states mapped to fundamental excitations by duality in the model with four hypermultiplets in the fundamental representation.
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| 9. |
- Cederwall, Martin, 1961, et al.
(författare)
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Monopole and dyon spectra in N=2 SYM with higher rank gauge groups
- 1996
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- We derive parts of the monopole and dyon spectra for N=2 super-Yang-Mills theories in four dimensions with gauge groups G of rank r>1 and matter multiplets. Special emphasis is put on G=SU(3) and those matter contents that yield perturbatively finite theories. There is no direct interpretation of the soliton spectra in terms of naive selfduality under strong-weak coupling and exchange of electric and magnetic charges. We argue that, in general, the standard procedure of finding the dyon spectrum will not give results that support a conventional selfduality hypothesis - the SU(2) theory with four fundamental hypermultiplets seems to be an exception. Possible interpretations of the results are discussed.
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| 10. |
- Cederwall, Martin, 1961, et al.
(författare)
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On the Dirac-Born-Infeld action for D-branes
- 1996
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Ingår i: Phys.Lett.B390:148-152,1997.
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Tidskriftsartikel (refereegranskat)abstract
- In this note, we consider the reformulation of the Dirac-Born-Infeld action for a Dirichlet p-brane in Brink-Di Vecchia-Howe-Tucker form, i.e., including an independent non-propagating world-volume metric. When p>2, the action becomes non-polynomial. A closed expression is derived for p=3. For selfdual field-strengths, the DBI action is reproduced by an action with a simple F^2 term. We speculate on supersymmetrization of the D_3-brane action. We also give the governing equations for arbitrary p, and derive an implicit expression for the D_4-brane lagrangian.
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