12 research outputs found
Section on Prospects for Dark Matter Detection of the White Paper on the Status and Future of Ground-Based TeV Gamma-Ray Astronomy
This is a report on the findings of the dark matter science working group for
the white paper on the status and future of TeV gamma-ray astronomy. The white
paper was commissioned by the American Physical Society, and the full white
paper can be found on astro-ph (arXiv:0810.0444). This detailed section
discusses the prospects for dark matter detection with future gamma-ray
experiments, and the complementarity of gamma-ray measurements with other
indirect, direct or accelerator-based searches. We conclude that any
comprehensive search for dark matter should include gamma-ray observations,
both to identify the dark matter particle (through the charac- teristics of the
gamma-ray spectrum) and to measure the distribution of dark matter in galactic
halos.Comment: Report from the Dark Matter Science Working group of the APS
commissioned White paper on ground-based TeV gamma ray astronomy (19 pages, 9
figures
Determining Supersymmetric Parameters With Dark Matter Experiments
In this article, we explore the ability of direct and indirect dark matter
experiments to not only detect neutralino dark matter, but to constrain and
measure the parameters of supersymmetry. In particular, we explore the
relationship between the phenomenological quantities relevant to dark matter
experiments, such as the neutralino annihilation and elastic scattering cross
sections, and the underlying characteristics of the supersymmetric model, such
as the values of mu (and the composition of the lightest neutralino), m_A and
tan beta. We explore a broad range of supersymmetric models and then focus on a
smaller set of benchmark models. We find that by combining astrophysical
observations with collider measurements, mu can often be constrained far more
tightly than it can be from LHC data alone. In models in the A-funnel region of
parameter space, we find that dark matter experiments can potentially determine
m_A to roughly +/-100 GeV, even when heavy neutral MSSM Higgs bosons (A, H_1)
cannot be observed at the LHC. The information provided by astrophysical
experiments is often highly complementary to the information most easily
ascertained at colliders.Comment: 46 pages, 76 figure
A comparison between the detection of gamma rays and positrons from neutralino annihilation
We study the indirect detection of neutralino dark matter using positrons and
gamma rays from its annihilation in the galactic halo. Considering the HESS
data as the spectrum constituting the gamma--ray background, we compare the
prospects for the experiments GLAST and PAMELA in a general supergravity
framework with non--universal scalar and gaugino masses. We show that with a
boost factor of about 10, PAMELA will be competitive with GLAST for typical NFW
cuspy profiles.Comment: 18 pages, 6 figures, 1 reference added. Final version to appear in
JCA
Recommended from our members
Section on prospects for dark matter detection of the white paper on the status and future of ground-based TeV gamma-ray astronomy.
This is a report on the findings of the dark matter science working group for the white paper on the status and future of TeV gamma-ray astronomy. The white paper was commissioned by the American Physical Society, and the full white paper can be found on astro-ph (arXiv:0810.0444). This detailed section discusses the prospects for dark matter detection with future gamma-ray experiments, and the complementarity of gamma-ray measurements with other indirect, direct or accelerator-based searches. We conclude that any comprehensive search for dark matter should include gamma-ray observations, both to identify the dark matter particle (through the characteristics of the gamma-ray spectrum) and to measure the distribution of dark matter in galactic halos
Recommended from our members
Section on prospects for dark matter detection of the white paper on the status and future of ground-based TeV gamma-ray astronomy.
This is a report on the findings of the dark matter science working group for
the white paper on the status and future of TeV gamma-ray astronomy. The white
paper was commissioned by the American Physical Society, and the full white
paper can be found on astro-ph (arXiv:0810.0444). This detailed section
discusses the prospects for dark matter detection with future gamma-ray
experiments, and the complementarity of gamma-ray measurements with other
indirect, direct or accelerator-based searches. We conclude that any
comprehensive search for dark matter should include gamma-ray observations,
both to identify the dark matter particle (through the charac- teristics of the
gamma-ray spectrum) and to measure the distribution of dark matter in galactic
halos
Millisecond Pulsar Origin of the Galactic Center Excess and Extended Gamma-Ray Emission from Andromeda: A Closer Look
Impact of astrophysical processes on the gamma-ray background from dark matter annihilations
Dark Matter Signatures in the Anisotropic Radio Sky.
We calculate intensity and angular power spectrum of the cosmological
background of synchrotron emission from cold dark matter annihilations into
electron positron pairs. We compare this background with intensity and
anisotropy of astrophysical and cosmological radio backgrounds, such as from
normal galaxies, radio-galaxies, galaxy cluster accretion shocks, the cosmic
microwave background and with Galactic foregrounds. Under modest assumptions
for the dark matter clustering we find that around 2 GHz average intensity and
fluctuations of the radio background at sub-degree scales allows to probe dark
matter masses >100 GeV and annihilation cross sections not far from the natural
values ~ 3 x 10^(-26) cm^3/s required to reproduce the correct relic
density of thermal dark matter. The angular power spectrum of the signal from
dark matter annihilation tends to be flatter than that from astrophysical radio
backgrounds. Furthermore, radio source counts have comparable constraining
power. Such signatures are interesting especially for future radio detectors
such as SKA.Comment: 30 papes, jcap preprint format, 11 figures; final version, very minor
change