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Half-maximal supergravity in three dimensions: supergeometry, differential forms and algebraic structure
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2012 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 6, 177- p.Article in journal (Refereed) Published
Abstract [en]

The half-maximal supergravity theories in three dimensions, which have local SO(8) x SO(n) and rigid SO(8, n) symmetries, are discussed in a superspace setting starting from the superconformal theory. The on-shell theory is obtained by imposing further constraints; it is essentially a non-linear sigma model that induces a Poincare supergeometry. The deformations of the geometry due to gauging are briefly discussed. The possible p-form field strengths are studied using supersymmetry and SO(8, n) symmetry. The set of such forms obeying consistent Bianchi identities constitutes a Lie super co-algebra while the demand that these identities admit solutions places a further constraint on the possible representations of SO(8, n) that the forms transform under which can be easily understood using superspace cohomology. The dual Lie superalgebra can then be identified as the positive sector of a Borcherds superalgebra that extends the Lie algebra of the duality group. In addition to the known p = 2, 3, 4 forms, which we construct explicitly, there are five-forms that can be non-zero in supergravity, while all forms with p > 5 vanish. It is shown that some six-forms can have non-trivial contributions at order alpha'.

Place, publisher, year, edition, pages
2012. no 6, 177- p.
Keyword [en]
Extended Supersymmetry, Superspaces, Supergravity Models
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-81803DOI: 10.1007/JHEP06(2012)177ISI: 000306418300086OAI: diva2:567511


Available from: 2012-11-13 Created: 2012-11-01 Last updated: 2012-11-13Bibliographically approved

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