https://doi.org/10.1140/epjc/s10052-009-0869-6
Regular Article - Theoretical Physics
Constraining the coupling constant between dark energy and dark matter
Center for Advanced Mathematics and Physics, National University of Sciences and Technology, Peshawar Road, Rawalpindi, 46000, Pakistan
* e-mail: mjamil@camp.edu.pk
Received:
9
May
2008
Revised:
4
December
2008
Published online:
4
February
2009
We have investigated constraints on the coupling between dark matter and the interacting Chaplygin gas. Our results indicate that the coupling constant c between these two entities can take arbitrary values, which can be either positive or negative, thus giving arbitrary freedom to the inter-conversion between Chaplygin gas and dark matter. Thus, our results indicate that the restriction 0<c<1 on the coupling constant occurs as a very special case. Our analysis also supports the existence of phantom energy under certain conditions on the coupling constant.
© Springer-Verlag, 2009
