Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-09-09
Nucl.Phys.B737:49-72,2006
Physics
High Energy Physics
High Energy Physics - Theory
26 pages, 2 figures, JHEP3 class. Typos corrected, analysis expanded, references added
Scientific paper
10.1016/j.nuclphysb.2005.12.020
We present a novel supersymmetric solution to a nonlinear sigma model coupled to supergravity. The solution represents a static, supersymmetric, codimension-two object, which is different to the familiar cosmic strings. In particular, we consider 6D chiral gauged supergravity, whose spectrum contains a number of hypermultiplets. The scalar components of the hypermultiplet are charged under a gauge field, and supersymmetry implies that they experience a simple paraboloid-like (or 2D infinite well) potential, which is minimised when they vanish. Unlike conventional vortices, the energy density of our configuration is not localized to a string-like core. The solutions have two timelike singularities in the internal manifold, which provide the necessary boundary conditions to ensure that the scalars do not lie at the minimum of their potential. The 4D spacetime is flat, and the solution is a continuous deformation of the so-called ``rugby ball'' solution, which has been studied in the context of the cosmological constant problem. It represents an unexpected class of supersymmetric solutions to the 6D theory, which have gravity, gauge fluxes and hyperscalars all active in the background.
Parameswaran Susha L.
Tasinato Gianmassimo
Zavala Ivonne
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