3-11 July 2007
Merida, Mexico
Mexico/General timezone
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HE 3.3

Place

Location: Merida, Mexico
Room: Kabah (Holiday Inn)
Date: from 9 Jul 11:47 to 10 Jul 11:55

Timetable | Contribution List

Displaying 15 contributions out of 15
Type: Oral Session: HE 3.3
Track: HE.3.3
We discuss the general observational upper limits on the total annihilation rate of dark matter derived from the diffuse gamma ray background measured by the EGRET satellitr. We assume that the dark matter annihilates at tree level in the least detectable final states in the Standard Model, namely neutrinos. Any other decay channel would lead to stronger constraints. Electroweak jet cascading ... More
Presented by Dr. Pasquale Dario SERPICO on 10/7/2007 at 13:54
Type: Oral Session: HE 3.3
Track: HE.3.3
The General Antiparticle Spectrometer (GAPS) exploits low energy antideuterons produced in neutralino-neutralino annihilations as an indirect dark matter (DM) signature that is effectively free from background. When an antiparticle is captured by a target material, it forms exotic atom in an excited state which quickly decays by emitting X-rays of precisely defined energy and a correlated pio ... More
Presented by Dr. Jason E KOGLIN on 10/7/2007 at 16:30
Type: Oral Session: HE 3.3
Track: HE.3.3
We calculate the antideuteron flux expected from dark matter annihilation in the galactic halo. The propagation is treated in a full 2-D propagation model consistent with the results obtained from the propagation of B/C and other galactic species. We discuss the potentials of this indirect dark matter detection means and evaluate the possible sources of uncertainties affecting future measur ... More
Presented by Dr. Fiorenza DONATO on 10/7/2007 at 15:30
Type: Oral Session: HE 3.3
Track: HE.3.3
The Gamma-Ray Large Area Space Telescope (GLAST),scheduled to be launched in Fall 2007, is a next generation high energy gamma-ray observatory. The Large Area Telescope (LAT) instrument on-board GLAST with a wide field of view (>2 sr), large effective area and 20 MeV to >300 GeV energy range, will provide excellent opportunity for future Dark Matter studies. We present an overview o ... More
Presented by Dr. Eric NUSS on 10/7/2007 at 16:06
Type: Oral Session: HE 3.3
Track: HE.3.3
A number of models of quantum gravity violate Lorentz invariance and predict an energy dependence of the speed of light, leading to a dispersion of signals at high energies that travel over cosmological distances. Limits on the dispersion from short-duration substructures observed in soft gamma-rays emitted by GRBs at cosmological distances have provided interesting bounds on this violation o ... More
Presented by Prof. Stefan WAGNER on 10/7/2007 at 16:42
Type: Oral Session: HE 3.3
Track: HE.3.3
As a prototype for the AMS-02 experiment, the AMS-01 particle spectrometer was flown on the Space Shuttle Discovery in near earth orbit for a ten day mission in June 1998. Concerning the identification of positrons, AMS-01 was limited to energies below 3 GeV due to the vast proton background and the characteristics of the subdetectors. In order to extend the sensitivity towards higher ener ... More
Presented by Prof. Stefan Schael SCHAEL on 9/7/2007 at 16:50
Type: Oral Session: HE 3.3
Track: HE.3.3
The Alpha Magnetic Spectrometer (AMS), to be installed on the International Space Station, will provide data on cosmic radiations in a large range of rigidity from 0.5 GV up to 2 TV. The main physics goals in the astroparticle domain are the anti- matter and the dark matter searches. Observations and cosmology indicate that the Universe may include a large amount of unknown Dark Matter. It sh ... More
Presented by Dr. Sylvie ROSIER-LEES on 10/7/2007 at 15:42
Type: Oral Session: HE 3.3
Track: HE.3.3
The nearby dwarf spheroidal galaxy Draco with its high mass to light ratio is a promising target for indirect dark matter (DM) searches. It is located at a distance of about 82 kpc, at the edge of the Milky Way. The dwarf galaxy is enclosed by a DM halo where the DM particle may annihilate and produce an observable gamma-ray flux. Among the different DM particle candidates the lightest supers ... More
Presented by M. RISSI on 10/7/2007 at 16:18
Type: Oral Session: HE 3.3
Track: HE.3.3
Within the Cold Dark Matter scenario of structure formation, assuming the dark matter is composed by common candidates such as supersymmetric particles, the smallest bound structures have masses as low as 10^-6. High-resolution N-body experiments have shown that a large fraction of these small structures survive hierarchical clustering and can be found within the halo of our own Galaxy. These ... More
Presented by Dr. Lidia PIERI on 10/7/2007 at 14:42
Type: Oral Session: HE 3.3
Track: HE.3.3
Indirect detection signals from dark matter annihilation are studied in the positron channel. We discuss in detail the positron galactic production spectra and their propagation inside the galactic medium. Predictions for current and upcoming detectors are provided for neutralino dark matter in a variety of supersymmetric schemes. Correlations with other indirect detection signals are discu ... More
Presented by Dr. Fiorenza DONATO on 10/7/2007 at 14:06
Type: Oral Session: HE 3.3
Track: HE.3.3
Dwarf Sphreroidal galaxies are amongst the best target to search for a Dark Matter annihilation signal. The annihilation of WIMPs in the center of Sgr dwarf would produce high energy gamma-rays in the final state. Observations carried out with the H.E.S.S. array of Imaging Atmospheric Cherenkov telescopes are presented. A careful modelling of the Dark Matter halo profile of Sgr dwarf was perfo ... More
Presented by Dr. Emmanuel MOULIN on 10/7/2007 at 14:30
Type: Oral Session: HE 3.3
Track: HE.3.3
If non-baryonic dark matter exists in the form of neutralinos, a neutrino flux is expected from the decay of neutralino pair annihilation products inside heavy celestial bodies. Data taken with the AMANDA-II neutrino telescope located at the South Pole can be used in a search for this indirect dark matter signal. We will present current results from searches for neutralinos accumulated in th ... More
Presented by Mr. Daan HUBERT on 10/7/2007 at 14:18
Type: Oral Session: HE 3.3
Track: HE.3.3
The space satellite GLAST is expected to play a crucial role in indirect Dark Matter searches, thanks both to its ability to perform observations at energy scales comparable to the mass of common dark matter candidates and to its potential of making deep full-sky maps in gamma-rays, thanks to its large field-of-view. Here we will describe the prospects for detecting gamma-rays from point sou ... More
Presented by Dr. Aldo MORSELLI on 10/7/2007 at 15:54
Type: Oral Session: HE 3.3
Track: HE.3.3
Observation of cosmic-ray positron spectrum at the HEAT experiment indicates an excess at high energies (>8 GeV). It is suggested that the excess may be associated with dark matter annihilation. We calculate the Galactic positron flux from dark matter annihilation in the frame of supersymmetry, taking the enhancement of the flux by existence of dark matter substructures into account. The propa ... More
Presented by Dr. Qiang YUAN
Type: Oral Session: HE 3.3
Track: HE.3.3
The annihilation of relic Dark Matter(DM) in the galactic halo leads to a new primary source of gamma rays, positrons and antiprotons, which may be observed as an excess on top of the cosmic rays (CR) background calculated within a galactic model. With assumptions of isotropic propagation and smooth gas distribution the uncertainties in the prediction of local CR fluxes do not exceed 20% ... More
Presented by Dr. Valery ZHUKOV on 10/7/2007 at 13:42
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