Regular Article - Theoretical Physics
Kinematics of radion field: a possible source of dark matter
IUCAA, Post Bag 4, Ganeshkhind, Pune University Campus, Pune, 411 007, India
2 Department of Theoretical Physics, Indian Association for the Cultivation of Science, Kolkata, 700032, India
Accepted: 11 November 2016
Published online: 25 November 2016
The discrepancy between observed virial and baryonic mass in galaxy clusters have lead to the missing mass problem. To resolve this, a new, non-baryonic matter field, known as dark matter, has been invoked. However, till date no possible constituents of the dark matter components are known. This has led to various models, by modifying gravity at large distances to explain the missing mass problem. The modification to gravity appears very naturally when effective field theory on a lower-dimensional manifold, embedded in a higher-dimensional spacetime is considered. It has been shown that in a scenario with two lower-dimensional manifolds separated by a finite distance is capable to address the missing mass problem, which in turn determines the kinematics of the brane separation. Consequences for galactic rotation curves are also described.
© The Author(s), 2016