H.Sung Cheon (ì²íì±, ååè) - DESY Theory workshop 2008
H.Sung Cheon (ì²íì±, ååè) - DESY Theory workshop 2008
H.Sung Cheon (ì²íì±, ååè) - DESY Theory workshop 2008
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We consider coexisting two kinds of DM, Singlet fermion and Singlet<br />
scalar, from an Extended Seesaw Model.<br />
We expect to explain several problems of the observations into our<br />
model.<br />
Large scale (>>1 Mpc) : Standard CDM (WIMP)<br />
-> Singlet Fermion<br />
Small scale (< few Mpc) : The density problem of the center of<br />
galaxy & DAMA experiment<br />
-> Singlet Scalar (self-interacting DM : David N. Spergel and Paul J.<br />
Steinhardt )<br />
Abell 520 Cluster :<br />
1) Self-interacting<br />
2) Interaction between Singlet scalar and Singlet<br />
fermion (I notice that this case)
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