Localising gravity in composite monopole brane worlds without bulk cosmological constant |
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Authors: | Eugê nio R. Bezerra de Mello,Betti Hartmann |
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Affiliation: | 1. Departamento de Física-CCEN, Universidade Federal da Paraíba, 58.059-970, J. Pessoa, PB, C. Postal 5.008, Brazil;2. School of Engineering and Science, International University Bremen (IUB), 28725 Bremen, Germany |
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Abstract: | We study a 7-dimensional brane world scenario with a Ricci-flat 3-brane residing in the core of a composite monopole defect, i.e., a defect composed of a 't Hooft–Polyakov and a global monopole. Admitting a direct interaction between the two bosonic sectors of the theory, we analyse the structure of the space–time in the limits of small, respectively large direct interaction coupling constant. For large direct interaction, the global monopole disappears from the system and leaves behind a negative cosmological constant in the bulk such that gravity-localising solutions are possible without a priori introduction of a bulk cosmological constant. |
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Keywords: | 04.20.Jb 04.40.Nr 04.50.+h 11.10.Kk |
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