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IDM2008 - Identification of Dark Matter 2008
IDM2008 - Identification of Dark Matter 2008
18-22 August 2008 AlbaNova
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Dark matter annihilation signals -- the importance of radiative corrections (15'+5')
 
Being able to safely distinguish astrophysical from potential dark matter (DM)
annihilation signals is of utmost importance for indirect DM searches. For this, 
one
has in general to rely on distinctive -- and unique -- spectral signatures to look
for. In this talk, I point out that internal bremsstrahlung, which unavoidably
accompanies charged annihilation products, provides such a signature. In fact, it
often even dominates the gamma-ray spectrum expected from DM 
annihilations,
demonstrating that radiative corrections can significantly exceed naive 
expectations;
for a large part of the WIMP parameter space internal bremsstrahlung, 
furthermore,
turns out to be more important for indirect DM searches than the traditionally
looked-for line signals. The gamma-ray contributions reported here may 
therefore be
of great importance for upcoming observatories like the soon to be launched 
GLAST
sattellite or the new generation of Air Cherenkov Telescopes. I illustrate in some
detail the situation for neutralino DM in mSUGRA and the MSSM, but also briefly
mention other DM candidates such as the
lightest Kaluza-Klein particle appearing in models with universal extra 
dimensions.
Finally, I comment on the potential of using these signatures to distinguish 
between
different DM candidates and on the importance of radiative corrections for other
annihilation channels, in particular positrons.
 
Id: 372
Place: AlbaNova
Room: Oskar Klein auditorium
Starting date:
18-Aug-2008   14:45
Duration: 20'
Contribution type: Talk
Primary Authors: Dr. BRINGMANN, Torsten (SU Fysikum)
Presenters: Dr. BRINGMANN, Torsten
Material: slide Slides
 
Included in session: Indirect searches - gammas
Included in track: Indirect searches - gammas
 

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