236 research outputs found
Indirect searches for neutralino dark matter
There is mounting evidence for dark matter in the Universe and one of the
favourite dark matter candidates is the neutralino, which naturally appears as
the lightest supersymmetric particle (LSP) in many supersymmetric extensions of
the standard model. The neutralino has the desired properties to be a good dark
matter candidate and we will here review the different indirect searches for
neutralino dark matter and discuss the implications on these from recent direct
searches.Comment: 6 pages, LaTeX, proceedings of the 4th International Workshop on
Identification of Dark Matter (idm2002), York, England, 2-6 September, 200
Indirect Detection of Neutralino Dark Matter up to TeV Scale
In this paper, we will describe the results of SUSY parameter space searches
including minimal supergravity, non-universal supergravity and minimal
supersymmetry and the implications on the indirect detection of neutralino dark
matter. We give special attention to the effects of detector thresholds, solar
absorption of neutrinos and hadronization of neutralino annihilation products.
These effects are known to be important in calculating accurate event rates.Comment: 10 pages, 9 figures, Proceedings of 30 Years of Supersymmetry,
Minneapolis, MN, October 200
Spectral Gamma-ray Signatures of Cosmological Dark Matter Annihilation
We propose a new signature for weakly interacting massive particle (WIMP)
dark matter, a spectral feature in the diffuse extragalactic gamma-ray
radiation. This feature, a sudden drop of the gamma-ray intensity at an energy
corresponding to the WIMP mass, comes from the asymmetric distortion of the
line due to WIMP annihilation into two gamma-rays caused by the cosmological
redshift. Unlike other proposed searches for a line signal, this method is not
very sensitive to the exact dark matter density distribution in halos and
subhalos. The only requirement is that the mass distribution of substructure on
small scales follows approximately the Press-Schechter law, and that smaller
halos are on the average denser than large halos, which is a generic outcome of
N-body simulations of Cold Dark Matter, and which has observational support.
The upcoming Gamma-ray Large Area Space Telescope (GLAST) will be eminently
suited to search for these spectral features. For numerical examples, we use
rates computed for supersymmetric particle dark matter, where a detectable
signal is possible.Comment: 4 pages, 1 figure. Matches the published version. Conclusions
unchange
Anomalous and Dark Matter
We have studied the lightest masses in the fermionic sector of an anomalous
extension of the Minimal Supersymmetric Standard Model (MSSM) inspired
by brane constructions. The LSP of this model is an XWIMP (extremely weak
interaction particle). We have studied its relic density in the cases in which
there is mixing with the neutralinos of the MSSM and in the case in which there
is not such mixing. We have showed that this extended model can satisfy the
WMAP data. To perform this calculation we have modified the DarkSUSY package.Comment: 6 pages, 9 figures, proceedings of the RICAP 2011 conferenc
SUSY Tools for Dark Matter and at the Colliders
With present and upcoming SUSY searches both directly, indirectly and at
accelerators, the need for accurate calculations is large. We will here go
through some of the tools available both from a dark matter point of view and
at accelerators. For natural reasons, we will focus on public tools, even
though there are some rather sophisticated private tools as well.Comment: 20 pages, 4 figures, Chapter 16 of the book "Particle Dark Matter:
Observations, Models and Searches" edited by G. Bertone, Cambridge University
Press, http://cambridge.org/us/catalogue/catalogue.asp?isbn=978052176368
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