https://doi.org/10.1140/epjc/s10052-014-3100-3
Regular Article - Theoretical Physics
Diagnosing holographic dark energy models with statefinder hierarchy
1
Department of Physics, College of Sciences, Northeastern University, Shenyang, 110004, China
2
Center for High Energy Physics, Peking University, Beijing, 100080, China
* e-mail: zhangxin@mail.neu.edu.cn
Received:
4
September
2014
Accepted:
23
September
2014
Published online:
15
October
2014
We apply a series of null diagnostics based on the statefinder hierarchy to diagnose different holographic dark energy models including the original holographic dark energy, the new holographic dark energy, the new agegraphic dark energy, and the Ricci dark energy models. We plot the curves of statefinders 
and 
versus redshift 
and the evolutionary trajectories of 
and 
for these models, where 
is the fractional growth parameter. Combining the evolution curves with the current values of , , and , we find that the statefinder performs better than for diagnosing the holographic dark energy models. In addition, the conjunction of the statefinder hierarchy and the fractional growth parameter is proven to be a useful method to diagnose the holographic dark energy models, especially for breaking the degeneracy of the new agegraphic dark energy model with different parameter values.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
