Gravitational constraints of dS branes in an AdS Einstein-Brans-Dicke bulk

Autor(es)

Hoff da Silva, J. M. ^[1] ; da Rocha, Roldao ^[2]

Afiliação do(s) autor(es)

^[1] UNESP, DFQ, BR-12516410 Guaratingueta, SP - Brazil

^[2] Univ Fed ABC, Ctr Matemat Comp & Cognicao, BR-09210170 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Classical and Quantum Gravity; v. 27, n. 22 NOV 21 2010.
• Citações Web of Science: 6

Resumo

We derive the full projected Einstein-Brans-Dicke gravitational equations associated with an n-dimensional brane embedded in an (n + 1)-dimensional bulk. Using general conditions, as the positivity of the Brans-Dicke parameter and the effective Newton gravitational constant as well, we can constrain the brane cosmological constant in terms of the brane tension, the Brans-Dicke scalar field and the trace of the stress tensor on the brane, in order to achieve a dS brane. Applying these constraints to a specific five-dimensional model, a lower bound for the scalar field on the brane is elicited without solving the full equations. It is shown under which conditions the effective brane cosmological constant can be ignored in the brane projected gravitational field equations, suggesting a different fine tuning between the brane tension and the bulk cosmological constant. (AU)

• Processo FAPESP: 09/01246-8 - Aspectos Cosmológicos de Branas em Gravitação de Brans-Dicke em Diferentes Dimensões
• Beneficiário: Julio Marny Hoff da Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado