Neutrino and axion hot dark matter bounds after WMAP-7

Hannestad, Steen; Mirizzi, Alessandro; Raffelt, Georg G.; Wong, Yvonne Y. Y.

doi:10.1088/1475-7516/2010/08/001

Cited by 101 publications

(102 citation statements)

References 45 publications

(57 reference statements)

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“…In the latter case, one has an interesting prediction of maximally hierarchical neutrinos, since only two of them are massive. This fits nicely with cosmological considerations, which keep lowering the sum of light neutrino masses [40]. Moreover, the decays of the heavy extra neutrinos N are governed by the Dirac mass terms, which are functions of the leptonic mixing matrix, the masses of N's, and only one complex parameter [41].…”

Section: Lhc Prospectssupporting

confidence: 81%

Inert doublet dark matter and mirror/extra families after Xenon100

et al. 2011

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It was shown recently that mirror fermions, naturally present in a number of directions for new physics, seem to require an inert scalar doublet in order to pass the electroweak precision tests. This provides a further motivation for considering the inert doublet as a dark matter candidate. Moreover, the presence of extra families enhances the standard model Higgs-nucleon coupling, which has crucial impact on the Higgs and dark matter searches. We study the limits on the inert dark matter mass in view of recent Xenon100 data. We find that the mass of the inert dark matter must lie in a very narrow window 75 ` 1 GeV while the Higgs boson must weigh more than 400 GeV. For the sake of completeness we discuss the cases with fewer extra families, where the possibility of a light Higgs boson opens up, enlarging the dark matter mass window to 12 mh-76 GeV. We find that Xenon100 constrains the DM-Higgs interaction, which in turn implies a lower bound on the monochromatic gamma ray flux from DM annihilation in the galactic halo. For the mirror case, the predicted annihilation cross section lies a factor of 4–5 below the current limit set by Fermi LAT, thus providing a promising indirect detection signal.It was shown recently that mirror fermions, naturally present in a number of directions for new physics, seem to require an inert scalar doublet in order to pass the electroweak precision tests. This provides a further motivation for considering the inert doublet as a dark matter candidate. Moreover, the presence of extra families enhances the standard model Higgs-nucleon coupling, which has crucial impact on the Higgs and dark matter searches. We study the limits on the inert dark matter mass in view of recent Xenon100 data. We find that the mass of the inert dark matter must lie in a very narrow window 75 +/- 1 GeV while the Higgs boson must weigh more than 400 GeV. For the sake of completeness we discuss the cases with fewer extra families, where the possibility of a light Higgs boson opens up, enlarging the dark matter mass window to 1 2 m(h)-76 GeV. We find that Xenon100 constrains the DM-Higgs interaction, which in turn implies a lower bound on the monochromatic gamma ray flux from DM annihilation in the galactic halo. For the mirror case, the predicted annihilation cross section lies a factor of 4-5 below the current limit set by Fermi LAT, thus providing a promising indirect detection signal

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Section: Lhc Prospectssupporting

confidence: 81%

Inert doublet dark matter and mirror/extra families after Xenon100

et al. 2011

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“…Moreover, a larger value for N eff $ 4 could arise from a completely different physics, related to axions (see e.g. [23]), gravity waves [24], decaying particles (see e.g. [25]), extra dimensions [26,27], and dark energy (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Case for dark radiation

2011

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Combined analyses of recent cosmological data are showing interesting hints for the presence of an extra relativistic component, coined dark radiation. Here, we perform a new search for dark radiation, parametrizing it with an effective number of relativistic degrees of freedom parameter, N eff . We show that the cosmological data we considered are clearly suggesting the presence of an extra relativistic component with N eff ¼ 4:08

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“…In the Standard Model of elementary particles, there are three active neutrinos. However, additional sterile neutrino species, or extra relativistic degrees of freedom, could also arise in a number of extensions to the Standard Model of particle physics, as for instance, in axion models [1], in decaying of nonrelativistic matter models [2], in scenarios with gravity waves [3], extra dimensions [4], and early dark energy [5], or in asymmetric dark matter models [6]. Cosmological data provide a tool to test the neutrino properties, since the neutrino masses and abundances affect both the cosmic microwave background (CMB) physics as well as the galaxy clustering properties; see Refs.…”

Section: Introductionmentioning

confidence: 99%

Neutrino and dark radiation properties in light of recent CMB observations

et al. 2013

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Recent cosmic microwave background measurements at high multipoles from the South Pole Telescope and from the Atacama Cosmology Telescope seem to disagree in their conclusions for the neutrino and dark radiation properties. In this paper we set new bounds on the dark radiation and neutrino properties in different cosmological scenarios combining the ACT and SPT data with the nine-year data release of the Wilkinson Microwave Anisotropy Probe (WMAP-9), baryon acoustic oscillation data, Hubble Telescope measurements of the Hubble constant, and supernovae Ia luminosity distance data. In the standard three massive neutrino case, the two high multipole probes give similar results if baryon acoustic oscillation data are removed from the analyses and Hubble Telescope measurements are also exploited. A similar result is obtained within a standard cosmology with N eff massless neutrinos, although in this case the agreement between these two measurements is also improved when considering simultaneously baryon acoustic oscillation data and Hubble Space Telescope measurements. In the N eff massive neutrino case the two high multipole probes give very different results regardless of the external data sets used in the combined analyses. When considering extended cosmological scenarios with a dark energy equation of state or with a running of the scalar spectral index, the evidence for neutrino masses found for the South Pole Telescope in the three neutrino scenario disappears for all the data combinations explored here. Again, adding Hubble Telescope data seems to improve the agreement between the two high multipole cosmic microwave background measurements considered here. In the case in which a dark radiation background with unknown clustering properties is also considered, SPT data seem to exclude the standard value for the dark radiation viscosity c 2 vis ¼ 1=3 at the 2 C.L., finding evidence for massive neutrinos only when combining SPT data with baryon acoustic oscillation measurements.

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Neutrino and axion hot dark matter bounds after WMAP-7

Cited by 101 publications

References 45 publications

Inert doublet dark matter and mirror/extra families after Xenon100

Inert doublet dark matter and mirror/extra families after Xenon100

Case for dark radiation

Neutrino and dark radiation properties in light of recent CMB observations

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