Tran - DESY Theory workshop 2008
Tran - DESY Theory workshop 2008
Tran - DESY Theory workshop 2008
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The Positron Fraction<br />
Using the EGRET excess to fix m 3/2 , τ 3/2 predicts a bump in the<br />
positron fraction in just the right energy range<br />
HEAT 94/95/00<br />
AMS-01 98<br />
CAPRICE 94<br />
MASS 91<br />
0.1<br />
Positron fraction e + /(e + + e − )<br />
Isothermal<br />
Moore et al.<br />
NFW<br />
Background only<br />
0.01<br />
1 10 100 1000<br />
T [GeV]<br />
[A. Ibarra, DT <strong>2008</strong>]<br />
m 3/2 = 150 GeV, τ 3/2 = 1.3 × 10 26 s, M2 propagation model.<br />
Excellent agreement with the positron fraction measured by HEAT!<br />
David <strong>Tran</strong><br />
Indirect Signatures of Gravitino Dark Matter with Broken R-Parity
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