Neutrino Mass from Cosmology

Lesgourgues, Julien; Pastor, S.

doi:10.1155/2012/608515

Cited by 202 publications

(230 citation statements)

References 86 publications

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“…For observationallyrelevant masses, neutrinos are still relativistic at recombination and the unique effects of masses in the primary power spectra are small. The main effect is around the first acoustic peak and is due to the early integrated Sachs-Wolfe (ISW) effect; neutrino masses have an impact here even for a fixed redshift of matter-radiation equality (Lesgourgues & Pastor 2012;Hou et al 2014;Lesgourgues et al 2013). To date, this effect has been the dominant one in constraining the neutrino mass from CMB data, as demonstrated in Hou et al (2014).…”

Section: Constraints On the Total Mass Of Active Neutrinosmentioning

confidence: 99%

Planck2013 results. XVI. Cosmological parameters

Ade¹,

Aghanim²,

Armitage-Caplan³

et al. 2014

A&A

5,034

163

2,253

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This paper presents the first cosmological results based on Planck measurements of the cosmic microwave background (CMB) temperature and lensing-potential power spectra. We find that the Planck spectra at high multipoles ( > ∼ 40) are extremely well described by the standard spatiallyflat six-parameter ΛCDM cosmology with a power-law spectrum of adiabatic scalar perturbations. Within the context of this cosmology, the Planck data determine the cosmological parameters to high precision: the angular size of the sound horizon at recombination, the physical densities of baryons and cold dark matter, and the scalar spectral index are estimated to be θ * = (1.04147 ± 0.00062) × 10 −2 , Ω b h 2 = 0.02205 ± 0.00028, Ω c h 2 = 0.1199 ± 0.0027, and n s = 0.9603 ± 0.0073, respectively (note that in this abstract we quote 68% errors on measured parameters and 95% upper limits on other parameters). For this cosmology, we find a low value of the Hubble constant, H 0 = (67.3 ± 1.2) km s −1 Mpc −1 , and a high value of the matter density parameter, Ω m = 0.315 ± 0.017. These values are in tension with recent direct measurements of H 0 and the magnituderedshift relation for Type Ia supernovae, but are in excellent agreement with geometrical constraints from baryon acoustic oscillation (BAO) surveys. Including curvature, we find that the Universe is consistent with spatial flatness to percent level precision using Planck CMB data alone. We use high-resolution CMB data together with Planck to provide greater control on extragalactic foreground components in an investigation of extensions to the six-parameter ΛCDM model. We present selected results from a large grid of cosmological models, using a range of additional astrophysical data sets in addition to Planck and high-resolution CMB data. None of these models are favoured over the standard six-parameter ΛCDM cosmology. The deviation of the scalar spectral index from unity is insensitive to the addition of tensor modes and to changes in the matter content of the Universe. We find an upper limit of r 0.002 < 0.11 on the tensor-to-scalar ratio. There is no evidence for additional neutrino-like relativistic particles beyond the three families of neutrinos in the standard model. Using BAO and CMB data, we find N eff = 3.30 ± 0.27 for the effective number of relativistic degrees of freedom, and an upper limit of 0.23 eV for the sum of neutrino masses. Our results are in excellent agreement with big bang nucleosynthesis and the standard value of N eff = 3.046. We find no evidence for dynamical dark energy; using BAO and CMB data, the dark energy equation of state parameter is constrained to be w = −1.13 +0.13 −0.10 . We also use the Planck data to set limits on a possible variation of the fine-structure constant, dark matter annihilation and primordial magnetic fields. Despite the success of the six-parameter ΛCDM model in describing the Planck data at high multipoles, we note that this cosmology does not provide a good fit to the temperature power spectrum at low multipoles. T...

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Section: Constraints On the Total Mass Of Active Neutrinosmentioning

confidence: 99%

Planck2013 results. XVI. Cosmological parameters

Ade¹,

Aghanim²,

Armitage-Caplan³

et al. 2014

A&A

5,034

163

2,253

View full text Add to dashboard Cite

show abstract

“…Their impact on the CMB is discussed in [34], where the shape of the power spectrum can depend upon the individual neutrino kinetic energies through their characteristic free-streaming lengths. The early Integrated Sachs-Wolfe effect (eISW) is also sensitive to the masses if the neutrinos become non-relativistic during decoupling (thereby affecting the radiation energy density and the growth of inhomogeneities) [33].…”

Section: And Thus Arrive Atmentioning

confidence: 99%

Cosmological signals of a mirror twin Higgs

Craig

Koren

Trott

2017

J. High Energ. Phys.

138

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Abstract:We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpart leads to significant dark radiation in tension with BBN and CMB observations. We quantify this tension and illustrate how it can be mitigated in several simple scenarios that alter the relative energy densities of the two sectors while respecting the softly-broken mirror symmetry. In particular, we consider both the out-of-equilibrium decay of a new scalar as well as reheating in a toy model of twinned inflation, Twinflation. In both cases the dilution of energy density in the twin sector does not merely reconcile the existence of a mirror Twin Higgs with cosmological constraints, but predicts contributions to cosmological observables that may be probed in current and future CMB experiments. This raises the prospect of discovering evidence of neutral naturalness through cosmology rather than colliders.

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“…If instead Ωmh 2 is kept fixed when varying the neutrino mass, the redshift of matter-radiation equality will change, which affects the position and amplitude of the acoustic peaks in the CMB power spectrum (for more details see e.g. Lesgourgues & Pastor 2012). Weak gravitational lensing of the CMB photons encodes information about the late-time Universe with the Planck kernel peaking at around z ∼ 2 (Ade et al 2013c).…”

Section: Introductionmentioning

confidence: 99%

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: signs of neutrino mass in current cosmological data sets

Beutler

Saito

Brownstein

et al. 2014

Monthly Notices of the Royal Astronomical Society

125

143

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We investigate the cosmological implications of the latest growth of structure measurement from the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 with particular focus on the sum of the neutrino masses, m ν . We examine the robustness of the cosmological constraints from the Baryon Acoustic Oscillation (BAO) scale, the Alcock-Paczynski effect and redshift-space distortions (D V /r s , F AP , f σ 8 ) of Beutler et al. (2013), when introducing a neutrino mass in the power spectrum template. We then discuss how the neutrino mass relaxes discrepancies between the Cosmic Microwave Background (CMB) and other low-redshift measurements within ΛCDM. Combining our cosmological constraints with WMAP9 yields m ν = 0.36 ± 0.14 eV (68% c.l.), which represents a 2.6σ preference for non-zero neutrino mass. The significance can be increased to 3.3σ when including weak lensing results and other BAO constraints, yielding m ν = 0.35 ± 0.10 eV (68% c.l.). However, combining CMASS with Planck data reduces the preference for neutrino mass to ∼ 2σ. When removing the CMB lensing effect in the Planck temperature power spectrum (by marginalising over A L ), we see shifts of ∼ 1σ in σ 8 and Ω m , which have a significant effect on the neutrino mass constraints. In case of CMASS plus Planck without the A L -lensing signal, we find a preference for a neutrino mass of m ν = 0.34 ± 0.14 eV (68% c.l.), in excellent agreement with the WMAP9+CMASS value. The constraint can be tightened to 3.4σ yielding m ν = 0.36 ± 0.10 eV (68% c.l.) when weak lensing data and other BAO constraints are included.

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Neutrino Mass from Cosmology

Cited by 202 publications

References 86 publications

Planck2013 results. XVI. Cosmological parameters

Planck2013 results. XVI. Cosmological parameters

Cosmological signals of a mirror twin Higgs

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: signs of neutrino mass in current cosmological data sets

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