Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The power spectrum of SUSY-CDM on sub-galactic scales   The formation of large scale structure is independent of the nature of the
cold dark matter (CDM), however the fate of very small scale inhomogeneities
depends on the micro-physics of the CDM particles. We investigate the matter
power spectrum for scales that enter the Hubble radius well before
matter-radiation equality, and follow its evolution until the time when the
first inhomogeneities become non-linear. Our focus lies on weakly interacting
massive particles (WIMPs), and as a concrete example we analyze the case when
the lightest supersymmetric particle is a bino. We show that collisional
damping and free-streaming of WIMPs lead to a matter power spectrum with a
sharp cut-off at about 10^(-6) M_odot and a maximum close to that cut-off. We
also calculate the transfer function for the growth of the inhomogeneities in
the linear regime. These three effects (collisional damping, free-streaming and
gravitational growth) are combined to provide a WMAP normalized primordial CDM
power spectrum, which could serve as an input for high resolution CDM
simulations. The smallest inhomogeneities typically enter the non-linear regime
at a redshift of about 60.

17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph