Dilatonic current-carrying cosmic strings

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorFRE 2435-CNRS-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorPeter, Patrick-
Autor(es): dc.creatorGuimarães, M. E.X.-
Autor(es): dc.creatorAndrade, V. C.-
Data de aceite: dc.date.accessioned2025-08-21T17:53:54Z-
Data de disponibilização: dc.date.available2025-08-21T17:53:54Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2003-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.67.123509-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/224343-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/224343-
Descrição: dc.descriptionWe investigate the nature of ordinary cosmic vortices in some scalar-tensor extensions of gravity. We find solutions for which the dilaton field condenses inside the vortex core. These solutions can be interpreted as raising the degeneracy between the eigenvalues of the effective stress-energy tensor, namely, the energy per unit length U and the tension T, by picking a privileged spacelike or timelike coordinate direction; in the latter case, a phase frequency threshold occurs that is similar to what is found in ordinary neutral current-carrying cosmic strings. We find that the dilaton contribution for the equation of state, once averaged along the string worldsheet, vanishes, leading to an effective Nambu-Goto behavior of such a string network in cosmology, i.e.on very large scales. It is found also that on small scales, the energy per unit length and tension depend on the string internal coordinates in such a way as to permit the existence of centrifugally supported equilibrium configuration, also known as vortons, whose stability, depending on the very short distance (unknown) physics, can lead to catastrophic consequences on the evolution of the Universe. © 2003 The American Physical Society.-
Descrição: dc.descriptionInstitut d’Astrophysique de Paris GReCO FRE 2435-CNRS, 98bis boulevard Arago, Paris, 75014-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, 01405-900-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, 01405-900-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review D - Particles, Fields, Gravitation and Cosmology-
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Título: dc.titleDilatonic current-carrying cosmic strings-
Tipo de arquivo: dc.typelivro digital-
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