Asymmetric dark matter may not be light

被引:17
|
作者
Hall, Eleanor [1 ,2 ]
McGehee, Robert [3 ]
Murayama, Hitoshi [1 ,2 ,4 ]
Suter, Bethany [1 ,2 ]
机构
[1] Univ Calif Berkeley, Berkeley Ctr Theoret Phys, Berkeley, CA 94720 USA
[2] Lawrence Berkeley Natl Lab, Theory Grp, Berkeley, CA 94720 USA
[3] Univ Michigan, Leinweber Ctr Theoret Phys, Dept Phys, Ann Arbor, MI 48109 USA
[4] Univ Tokyo, Kavli Inst Phys & Math Universe WP1, Kashiwa, Chiba 2778583, Japan
关键词
PHASE-TRANSITION; ELECTROWEAK; MODEL; BARYOGENESIS; BARYON;
D O I
10.1103/PhysRevD.106.075008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
It is often said that asymmetric dark matter is light compared to typical weakly interacting massive particles. Here we point out a simple scheme with a neutrino portal and O(60 GeV) asymmetric dark matter which may be "added" to any standard electroweak baryogenesis scenario. The dark sector contains a copy of the Standard Model gauge group, as well as one matter family (at least), Higgs, and right-handed neutrino. After baryogenesis, some lepton asymmetry is transferred to the dark sector through the neutrino portal where dark sphalerons convert it into a dark baryon asymmetry. Dark hadrons form asymmetric dark matter and may be directly detected due to the vector portal. Surprisingly, even dark anti-neutrons may be directly detected if they have a sizeable electric dipole moment. The dark photons visibly decay in current and future experiments which probe complementary parameter space to dark matter direct detection searches. Exotic Higgs decays are excellent signals at future e(+)e(-) Higgs factories.
引用
收藏
页数:9
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