Top-Down Models and UHECRs - rencontres de blois
Top-Down Models and UHECRs - rencontres de blois
Top-Down Models and UHECRs - rencontres de blois
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<strong>Top</strong>ological <strong>de</strong>fect mo<strong>de</strong>ls<br />
+ “generic” in SUSY-GUTs<br />
+ produced during reheating<br />
- typical <strong>de</strong>nsity: one per horizon/correlation length<br />
- main energy loss low-energy radiation<br />
favourable mo<strong>de</strong>ls for <strong>UHECRs</strong>:<br />
monopole-antimonopole pairs<br />
hybrid <strong>de</strong>fects: cosmic necklaces<br />
G → H ⊗U(1) → H ⊗Z 2<br />
monopoles M ∼ η m /e connected by strings µ s ∼ η 2 s<br />
parameter r = M/(µd):<br />
r ≪ 1 normal string dynamics<br />
r ≫ 1 non-rel. string network<br />
Rencontres <strong>de</strong> Blois 2008 Michael Kachelrieß <strong>Top</strong>-<strong>Down</strong> <strong>Mo<strong>de</strong>ls</strong>
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