Asymmetric inflationary reheating and the nature of mirror universe

Berezhiani, Zurab; Dolgov, A. D.; Mohapatra, R. N.

doi:10.1016/0370-2693(96)00219-5

Cited by 348 publications

(402 citation statements)

References 61 publications

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“…On the other hand, DR may have little to do with the observed particles in the Universe and instead may simply be light particles in the dark sector [8][9][10][11][12]. Weinberg recently presented a set-up [13], where the Goldstone bosons of a global symmetry in the dark sector lead to dark radiation, while the residual symmetry provides stability to a fermionic DM candidate.…”

mentioning

confidence: 99%

Dark Radiation Alleviates Problems with Dark Matter Halos

Chu

Dasgupta

2014

Phys. Rev. Lett.

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We show that a scalar and a fermion charged under a global U (1) symmetry can not only explain the existence and abundance of dark matter (DM) and dark radiation (DR), but also imbue DM with improved scattering properties at galactic scales, while remaining consistent with all other observations. Delayed DM-DR kinetic decoupling eases the missing satellites problem, while scalarmediated self-interactions of DM ease the cusp vs. core and too big to fail problems. In this scenario, DM is expected to be pseudo-Dirac and have a mass 100 keV m χ 10 GeV. The predicted DR may be measurable using the primordial elemental abundances from big bang nucleosynthesis (BBN), and using the cosmic microwave background (CMB). Introduction.-Cosmological and astrophysical data now firmly point towards the existence of new nonrelativistic particles, dubbed dark matter (DM), and there is a vigorous experimental program underway to discover these particles and measure their properties. Dark radiation (DR), on the other hand, refers to new relativistic particles that contribute to the cosmological energy density but are otherwise decoupled from ordinary matter and radiation. There is neither clear evidence nor a definitive exclusion, but several independent analyses of cosmological data show tantalizing hints for DR [1][2][3][4][5], most recently to reconcile the results from the Planck Collaboration [6] with those from BICEP2 Collaboration [7].

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mentioning

confidence: 99%

Dark Radiation Alleviates Problems with Dark Matter Halos

Chu

Dasgupta

2014

Phys. Rev. Lett.

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“…Such a scenario can be motivated by mirror models [52][53][54] or models of neutral naturalness [55][56][57][58][59][60][61][62].…”

Section: B Mirror Qcdmentioning

confidence: 99%

Dark spectroscopy at lepton colliders

2018

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Rich and complex dark sectors are abundant in particle physics theories. Here, we propose performing spectroscopy of the mass structure of dark sectors via mono-photon searches at lepton colliders. The energy of the mono-photon tracks the invariant mass of the invisible system it recoils against, which enables studying the resonance structure of the dark sector. We demonstrate this idea with several well-motivated models of dark sectors. Such spectroscopy measurements could potentially be performed at Belle II, BES-III and future low-energy lepton colliders.

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“…This avoids the tree level flavor changing neutral currents. We add soft mirror symmetry breaking terms, which may arise from a mirror symmetric model at high scale via spontaneous symmetry breaking [40]. They allow us to have symmetry breaking patterns in the two sectors different while the interactions and associated coupling constants remain symmetric.…”

Section: Direct Detection In An Asymmetric Dm Modelmentioning

confidence: 99%

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

Chen

Mohapatra

et al. 2010

Phys. Rev. D

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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 note 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 WIMPs. 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.

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Asymmetric inflationary reheating and the nature of mirror universe

Cited by 348 publications

References 61 publications

Dark Radiation Alleviates Problems with Dark Matter Halos

Dark Radiation Alleviates Problems with Dark Matter Halos

Dark spectroscopy at lepton colliders

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

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