4d-Flat Compactifications With Brane Vorticities

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dc.creatorRandjbar-Daemi, S.
dc.creatorRubakov, V.
dc.date2004-07-20
dc.date2004-09-28
dc.date.accessioned2026-07-07T10:50:05Z
dc.date.available2026-07-07T10:50:05Z
dc.descriptionWe present solutions in six-dimensional gravity coupled to a sigma model, in the presence of three-brane sources. The space transverse to the branes is a compact non-singular manifold. The example of O(3) sigma model in the presence of two three-branes is worked out in detail. We show that the four-dimensional flatness is obtained with a single condition involving the brane tensions, which are in general different and may be both positive, and another characteristic of the branes, vorticity. We speculate that the adjustment of the effective four-dimensional cosmological constant may occur through the exchange of vorticity between the branes. We then give exact instanton type solutions for sigma models targeted on a general Kähler manifold, and elaborate in this framework on multi-instantons of the O(3) sigma model. The latter have branes, possibly with vorticities, at the instanton positions, thus generalizing our two-brane solution.
dc.description8 pages. New references added and minor typos are corrected
dc.identifierhttps://arxiv.org/abs/hep-th/0407176
dc.identifierhttp://arxiv.org/abs/hep-th/0407176
dc.identifierJHEP0410:054,2004
dc.identifierdoi:10.1088/1126-6708/2004/10/054
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/184433
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.title4d-Flat Compactifications With Brane Vorticities
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