Accelerating universe in brane gravity with a confining potential

We construct the Einstein field equations on a 4-dimensional brane embedded in an m-dimensional bulk where the matter fields are confined to the brane by means of a confining potential. As a result, an extra term in the Friedmann equation in a m-dimensional bulk appears that may be interpreted as th...

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Bibliographic Details
Published in:	Physics letters. B Vol. 640; no. 1-2; pp. 1 - 6
Main Authors:	Heydari-Fard, M., Shirazi, M., Jalalzadeh, S., Sepangi, H.R.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 31-08-2006 Elsevier Science
Subjects:	Exact sciences and technology Nuclear physics Physics The physics of elementary particles and fields 04.20.-q 040.60.-m 040.50.+h Brane world Models Friedmann equation Einstein field equations Gravity
Online Access:	Get full text
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Summary:	We construct the Einstein field equations on a 4-dimensional brane embedded in an m-dimensional bulk where the matter fields are confined to the brane by means of a confining potential. As a result, an extra term in the Friedmann equation in a m-dimensional bulk appears that may be interpreted as the X-matter, providing a possible phenomenological explanation for the acceleration of the universe. The study of the relevant observational data suggests good agreement with the predictions of this model.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2006.07.020