Cosmic vortons

Davis, Richard L.; Shellard, E. P. S.

doi:10.1016/0550-3213(89)90594-4

Cited by 192 publications

(199 citation statements)

References 12 publications

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“…If exist as stationary field theory solutions, they might be stable. The issue of constructing such solutions is actually quite important, since stationary vortex loops stabilized by centrifugal force (they are called vortons [21]) have been extensively discussed for about last 20 years (see [2] for a review). However, to the best of our knowledge, such objects have never been constructed by resolving the field equations of the underlying field theory, excepting two examples obtained in a rigid and not local gauge field theory [22].…”

Section: Discussionmentioning

confidence: 99%

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Stability analysis of the twisted superconducting semilocal strings

Garaud¹,

Volkov²

2008

Nuclear Physics B

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We study the stability properties of the twisted vortex solutions in the semilocal Abelian Higgs model with a global SU(2) invariance. This model can be viewed as the WeinbergSalam theory in the limit where the non-Abelian gauge field decouples, or as a two component Ginzburg-Landau theory. The twisted vortices are characterized by a constant global current I, and for I → 0 they reduce to the semilocal strings, that is to the AbrikosovNielsen-Olesen vortices embedded into the semilocal model. Solutions with I = 0 are more complex and, in particular, they are less energetic than the semilocal strings, which makes one hope that they could have better stability properties. We consider the generic field fluctuations around the twisted vortex within the linear perturbation theory and apply the Jacobi criterion to test the existence of the negative modes in the spectrum of the fluctuation operator. We find that twisted vortices do not have the homogeneous instability known for the semilocal strings, neither do they have inhomogeneous instabilities whose wavelength is less than a certain critical value. This implies that short enough vortex pieces are perturbatively stable and suggests that small vortex loops could perhaps be stable as well. For longer wavelength perturbations there is exactly one negative mode in the spectrum whose growth entails a segmentation of the uniform vortex into a non-uniform, 'sausage like' structure. This instability is qualitatively similar to the hydrodynamical Plateau-Rayleigh instability of a water jet or to the Gregory-Laflamme instability of black strings in the theory of gravity in higher dimensions.

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Section: Discussionmentioning

confidence: 99%

“…The perturbation equations in the ANO limit split into the system of four coupled equations (A. 21) plus two decoupled equations (A.22).…”

Section: A Jacobi Test In the Ano Limitmentioning

confidence: 99%

Stability analysis of the twisted superconducting semilocal strings

Garaud¹,

Volkov²

2008

Nuclear Physics B

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“…Our analysis is applicable to any theory with decaying topological defects. As we will see, the strongest constraints result for theories with vortons [5]. The resulting constraints are in many cases stronger than the nucleosynthesis and dark matter constraints on vorton models obtained in previous work [6,7].…”

Section: Introductionmentioning

confidence: 70%

“…If any cosmic strings, either embedded strings or topologically stable strings, are current-carrying, then string loops would form a stationary equilibrium state or vorton [5]. For topological strings, the vortons could be very stable, particularly in the chiral case [7].…”

Section: Vortonsmentioning

confidence: 99%

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Microwave background constraints on decaying defects

2002

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Embedded defects are predicted in a host of particle physics theories, in particular in the standard electroweak theory. They can be stabilized by interactions with the cosmological plasma, but will decay once the plasma falls out of equilibrium, emitting a substantial fraction of non-thermal photons. If the decay happens after a redshift of about 10 6 , these photons will give rise to spectral distortions of the Cosmic Microwave Background, which leads to strong constraints on the underlying particle physics theory. Such constraints apply to any model with decaying defects, and in particular to theories predicting decaying vortons, thereby leading to constraints stronger than the dark matter limit.

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Cosmic Superstrings

Myers

Wyman

2009

String Cosmology

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Cosmic vortons

Cited by 192 publications

References 12 publications

Stability analysis of the twisted superconducting semilocal strings

Stability analysis of the twisted superconducting semilocal strings

Microwave background constraints on decaying defects

Cosmic Superstrings

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