PIRSA:C09012 - New Lights on Dark Matter - 2009PODCAST Subscribe to podcast

In the last few years, a new observational window has opened on the dark sector of matter. The recent flood of experimental results on direct and indirect dark matter detection has potentially revolutionized our view of the nature of dark matter. As the non gravitational nature of dark matter may well be revealing itself for the first time, initial results have lead to a reexamination of WIMP physics with the aim of enhancing the annihilation cross section through various means, and encouraged theorists to think of more exotic possibilities. The purpose of this workshop is to bring together leading theorists in this area, as well as representatives of the recent experiments, to encourage the sharing and debating of recent results and approaches to probing and describing the dark matter sector.

Organizer(s): Michael Trott   Brian Batell   Maxim Pospelov  

Collection URL: http://pirsa.org/C09012

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PIRSA:09060032  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Searching for Dark Matter with Cosmic Antiparticles: the PAMELA Experiment
Abstract: New results on the antiproton-to-proton and positron-to-all electron ratios over a wide energy range (1 – 100 GeV) have been obtained by the PAMELA mission. These data are mainly interpreted in terms of dark matter annihilation or pulsar contribution. The instrument PAMELA, in orbit since ... read more
Date: 11/06/2009 - 9:00 am

PIRSA:09060033  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Recent Results from the ATIC Experiment
Speaker(s): Eun-Suk Seo
Abstract: The balloon-borne Advanced Thin Ionization Calorimeter (ATIC) experiment has measured the cosmic-ray electron spectrum over the energy range from 20 GeV to 3 TeV. The totally active Bismuth Germanate (BGO) calorimeter provides energy measurements with resolution of ~2%. The finely segmented Silicon ... read more
Date: 11/06/2009 - 9:40 am

PIRSA:09060056  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Observation of the high-energy cosmic-ray electron spectrum with Fermi and implications for dark matter scenarios
Speaker(s): Luca Baldini
Abstract: Successfully launched on June 11, 2008, Fermi is the reference high-energy gamma-ray space observatory of the current decade. The Fermi Large Area Telescope (LAT) has been collecting data continuously in nominal operations since August 2008, providing exciting results that are contributing to changi... read more
Date: 11/06/2009 - 10:20 am

PIRSA:09060047  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Seeing Dark Matter in cosmic rays?
Speaker(s): Marco Cirelli
Abstract: Recent data from the PAMELA satellite and a number of balloon experiment have reported unexpected excesses in the measured fluxes of cosmic rays. Are these the first direct evidences for Dark Matter? If yes, which DM models and candidates can explain these anomalies and what do they imply for future... read more
Date: 11/06/2009 - 11:20 am

PIRSA:09060035  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Dark Matter Interpretations of the Electron/Positron Excesses after FERMI
Speaker(s): Alessandro Strumia
Abstract: The cosmic-ray excess observed by PAMELA in the positron fraction and by FERMI and HESS in the electron + positron flux can be interpreted in terms of DM annihilations or decays into leptonic final states. Final states into tau's or 4mu give the best fit to the excess. However, in the annihilation s... read more
Date: 11/06/2009 - 12:00 pm

PIRSA:09060037  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The PAMELA excess int the light of cosmic ray propagation
Speaker(s): Pierre Salati
Abstract: The positron excess measured by PAMELA may be the long waited hint of the presence of dark matter particles in the Milky Way halo. But before we rejoice, we need to examine the other Possible astrophysical explanations. Whatever the sources -- DM or conventional -- a crucial ingredient is the transp... read more
Date: 11/06/2009 - 2:00 pm

PIRSA:09060052  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The origin of the cosmic ray positron/electron excesses in light of the recent observations
Speaker(s): Hasan Yuksel
Abstract: The spectra of cosmic ray electrons and positrons should have contributions from known sources such as particles accelerated in supernova remnants and from the cosmic rays interactions. Besides these guaranteed contributions, any evidence for an additional component may carry hints of a new phenomen... read more
Date: 11/06/2009 - 2:40 pm

PIRSA:09060039  ( MP4 Medium Res , MP3 , PDF ) Which Format?
CMB Constraints on Sommerfeld-Enhanced Dark Matter
Speaker(s): Tracy Slatyer
Abstract: Dark matter (DM) annihilation around the redshift of last scattering can alter the recombination history of the universe, broaden the last scattering surface, and influence the observed temperature and polarization fluctuations of the cosmic microwave background (CMB). Unlike other indirect astrophy... read more
Date: 11/06/2009 - 4:00 pm

PIRSA:09060040  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Did Dark Matter Annihilations Reionize the Universe?
Speaker(s): Dan Hooper
Abstract: TBA
Date: 11/06/2009 - 4:40 pm

PIRSA:09060058  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The PICASSO Dark Matter Search Experiment
Speaker(s): Ubi Wichoski
Abstract: The PICASSO experiment searches for cold dark matter through the direct detection of weakly interacting massive particles (WIMPs) via their spin-dependent interactions with fluorine at SNOLAB, Sudbury - ON, Canada. The detection principle is based on the superheated droplet technique; the detectors ... read more
Date: 12/06/2009 - 9:00 am

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