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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Feynman diagrams relevant to<br />
(a) S-nucleon elastic scattering<br />
(b) Φ-nucleon elastic scattering<br />
σ S ≈ λ2 2 |A n| 2<br />
π<br />
( m<br />
2<br />
∗<br />
m 4 h<br />
)<br />
,<br />
σ Φ = λ2 ν 2 EW |A n| 2<br />
4π<br />
( m<br />
2<br />
∗<br />
m 2 Φ m4 h<br />
)<br />
m ∗ = m S m n /(m S + m n )<br />
where<br />
. So far most experiments of direct detection<br />
assume that there exist the only one kind of dark matter, whereas we<br />
assume that two kinds of dark matter can be coexist. So in order to compare<br />
our results with experimental data we use a following relation,<br />
σ el<br />
(Cao, Ma, Wudka, Yuan)<br />
where is the σ el is the cross section of DM-nucleon elastic scattering and<br />
m 0<br />
is the mass of WIMP.<br />
= ɛ S<br />
σ S + ɛ Φ<br />
σ Φ<br />
m 0 m S m Φ
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