https://doi.org/10.1140/epjc/s10052-016-4581-z
Regular Article - Theoretical Physics
Cosmological constant, fine structure constant and beyond
School of Physics, Beijing Institute of Technology, Beijing, 100081, China
* e-mail: haowei@bit.edu.cn
Received:
23
August
2016
Accepted:
16
December
2016
Published online:
6
January
2017
In the present work, we consider the cosmological constant model 
, which is well motivated from three independent approaches. As is well known, the hint of varying fine structure constant 
was found in 1998. If is right, it means that the cosmological constant 
should also be varying. Here, we try to develop a suitable framework to model this varying cosmological constant , in which we view it from an interacting vacuum energy perspective. Then we consider the observational constraints on these models by using the 293 
data from the absorption systems in the spectra of distant quasars. We find that the model parameters can be tightly constrained to the very narrow ranges of 
typically. On the other hand, we can also view the varying cosmological constant model from another perspective, namely it can be equivalent to a model containing “dark energy” and “warm dark matter”, but there is no interaction between them. We find that this is also fully consistent with the observational constraints on warm dark matter.
© The Author(s), 2017
