Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Warm Dark Matter versus Bumpy Power Spectra   In this paper we are exploring the differences between a Warm Dark Matter
model and a CDM model where the power on a certain scale is reduced by
introducing a narrow negative feature ("dip"). This dip is placed in a way so
as to mimic the loss of power in the WDM model: both models have the same
integrated power out to the scale where the power of the Dip model rises to the
level of the unperturbed CDM spectrum again.
  Using N-body simulations we show that some of the large-scale clustering
patterns of this new model follow more closely the usual CDM scenario while
simultaneously suppressing small scale structures (within galactic halos) even
more efficiently than WDM. The analysis in the paper shows that the new Dip
model appears to be a viable alternative to WDM but it is based on different
physics. Where WDM requires the introduction of a new particle species the Dip
model is based on a non-standard inflationary period. If we are looking for an
alternative to the currently challenged standard LCDM structure formation
scenario, neither the LWDM nor the new Dip model can be ruled out based on the
analysis presented in this paper. They both make very similar predictions and
the degeneracy between them can only be broken with observations yet to come.

4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph