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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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Indirect dark matter search with the balloon-borne PEBS detector (15'+5')
 
A precision measurement of the cosmic-ray positron spectrum may help
to solve the puzzle of the nature of dark matter. Pairwise
annihilation of neutralinos, predicted by some supersymmetric
extensions to the standard model of particle physics, may leave a
distinct feature in the cosmic-ray positron spectrum.

As the available data are limited both in terms of statistics and
energy range, we are developing a balloon-borne detector (PEBS) with a
large acceptance of 4000 cm^2 sr.
A superconducting magnet creating a field of 0.8 T and a tracking
device consisting of scintillating fibers of 250 um diameter with
silicon photomultiplier readout will allow rigidity and charge
determination to energies above 100 GeV. The dominant proton background is
suppressed by the combination of an electromagnetic calorimeter and a
transition radiation detector consisting of fleece
layers interspersed with straw-tube proportional counters. The
calorimeter uses a sandwich of tungsten and scintillating fibers that
are again read out by silicon photomultipliers.

The design study, based on a detailed Geant4 simulation and testbeam
measurements, will be presented along with an interpretation of the
currently available positron data in the context of the mSUGRA
model. The constraints that future precise measurements could put on
this model will be discussed.
 
Id: 374
Place: AlbaNova
Room: Oskar Klein auditorium
Starting date:
20-Aug-2008   16:10
Duration: 20'
Contribution type: Talk
Primary Authors: Mr. GAST, Henning (I. Physikalisches Institut B, RWTH Aachen)
Co-Authors: Prof. SCHAEL, Stefan (I. Physikalisches Institut B, RWTH Aachen)
Dr. KIRN, Thomas (I. Physikalisches Institut B, RWTH Aachen)
Mr. GREIM, Roman (I. Physikalisches Institut B, RWTH Aachen)
Mr. ROPER YEARWOOD, Gregorio (I. Physikalisches Institut B, RWTH Aachen)
Presenters: Mr. GAST, Henning
Material: slide Slides
Backup slides
 
Included in session: Indirect searches - charged cosmic rays
Included in track: Indirect searches - charged cosmic rays
 

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