Short-baseline electron neutrino oscillation length after the Troitsk experiment

Giunti, C.; Laveder, M.; Li, Yu-Feng; Long, H. W.

doi:10.1103/physrevd.87.013004

Cited by 35 publications

(40 citation statements)

References 91 publications

(110 reference statements)

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“…In particle physics, this assumption can be motivated in several ways. For example, there has recently been renewed interest in models with one light sterile neutrino in order to explain the MiniBoone anomaly reported in Aguilar-Arevalo et al (2013), as well as reactor and Gallium anomalies (Giunti et al 2013). The statistical significance of these results is marginal and they should not be over-interpreted.…”

Section: Constraints On N Effmentioning

confidence: 77%

Planck2013 results. XVI. Cosmological parameters

Ade¹,

Aghanim²,

Armitage-Caplan³

et al. 2014

A&A

5,008

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 N Effmentioning

confidence: 77%

Planck2013 results. XVI. Cosmological parameters

Ade¹,

Aghanim²,

Armitage-Caplan³

et al. 2014

A&A

5,008

163

2,253

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“…The gray curves enclose the 95.45% C.L. allowed regions obtained by restricting the analysis to the data of ν e andν e disappearance experiments [13,130], taking into account the Mainz [131] and Troitsk [132,133] bounds. Also shown is the expected 95% C.L.…”

Section: Discussionmentioning

confidence: 99%

“…by a global fit of shortbaseline neutrino oscillation data [18,126] and the 95.45% C.L. allowed regions obtained by restricting the analysis to the data of ν e andν e disappearance experiments [13,130], taking into account the Mainz [131] and Troitsk [132,133] bounds. These last regions are interesting because it is possible that the disappearance of ν e andν e indicated by the reactor and Gallium anomalies will be confirmed by the future experiments whereas the LSND anomaly will not.…”

Section: Jhep06(2016)061mentioning

confidence: 99%

Light sterile neutrino sensitivity of 163Ho experiments

Gastaldo

Giunti

Zavanin

2016

J. High Energ. Phys.

Self Cite

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Abstract:We explore the sensitivity of 163 Ho electron capture experiments to neutrino masses in the standard framework of three-neutrino mixing and in the framework of 3+1 neutrino mixing with a sterile neutrino which mixes with the three standard active neutrinos, as indicated by the anomalies found in short-baseline neutrino oscillations experiments. We calculate the sensitivity to neutrino masses and mixing for different values of the energy resolution of the detectors, of the unresolved pileup fraction and of the total statistics of events, considering the expected values of these parameters in the two planned stages of the ECHo project (ECHo-1k and ECHo-1M). We show that an extension of the ECHo-1M experiment with the possibility to collect 10 16 events will be competitive with the KATRIN experiment. This statistics will allow to explore part of the 3+1 mixing parameter space indicated by the global analysis of short-baseline neutrino oscillation experiments. In order to cover all the allowed region, a statistics of about 10 17 events will be needed.

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“…The possibility of the existence of light sterile neutrinos has been motivated to explain the anomalies of short-baseline neutrino experiments [31][32][33][34][35][36][37][38][39][40]. It seems that the fully thermalized ( N eff ≈ 1) sterile neutrinos with eV-scale mass are needed to explain these results [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

A search for sterile neutrinos with the latest cosmological observations

Lü

Zhang

2017

Eur. Phys. J. C

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We report the result of a search for sterile neutrinos with the latest cosmological observations. Both cases of massless and massive sterile neutrinos are considered in the CDM cosmology. The cosmological observations used in this work include the Planck 2015 temperature and polarization data, the baryon acoustic oscillation data, the Hubble constant direct measurement data, the Planck SunyaevZeldovich cluster counts data, the Planck lensing data, and the cosmic shear data. We find that the current observational data give a hint of the existence of massless sterile neutrino (as dark radiation) at the 1.44σ level, and the consideration of an extra massless sterile neutrino can indeed relieve the tension between observations and improve the cosmological fit. For the case of massive sterile neutrino, the observations give a rather tight upper limit on the mass, which implies that actually a massless sterile neutrino is more favored. Our result is consistent with the recent result of neutrino oscillation experiment done by the Daya Bay and MINOS collaborations, as well as the recent result of cosmic ray experiment done by the IceCube collaboration.

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Short-baseline electron neutrino oscillation length after the Troitsk experiment

Cited by 35 publications

References 91 publications

Planck2013 results. XVI. Cosmological parameters

Planck2013 results. XVI. Cosmological parameters

Light sterile neutrino sensitivity of 163Ho experiments

A search for sterile neutrinos with the latest cosmological observations

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