Energy dependence of direct detection cross section for asymmetric mirror dark matter

Haipeng An*, Shao Long Chen, Rabindra N. Mohapatra, Shmuel Nussinov, Yue Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In a recent paper, four of the present authors proposed a class of dark matter models where generalized parity symmetry leads to equality of dark matter abundance with baryon asymmetry of the Universe and predicts dark matter mass to be around 5 GeV. In this paper, we explore how this model can be tested in direct search experiments. In particular, we point out that if the dark matter happens to be the mirror neutron, the direct detection cross section has the unique feature that it increases at low recoil energy unlike the case of conventional weakly interacting massive particles. It is also interesting to note that the predicted spin-dependent scattering could make significant contribution to the total direct detection rate, especially for light nucleus. With this scenario, one could explain recent DAMA and CoGeNT results.

Original languageEnglish
Article number023533
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number2
DOIs
StatePublished - 30 Jul 2010

Funding

FundersFunder number
National Science Foundation
Directorate for Mathematical and Physical Sciences0652363

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