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Title: Observables sensitive to absolute neutrino masses: A reappraisal after WMAP 3-year and first MINOS results

Abstract

In the light of recent neutrino oscillation and nonoscillation data, we revisit the phenomenological constraints applicable to three observables sensitive to absolute neutrino masses: The effective neutrino mass in single beta decay (m{sub {beta}}); the effective Majorana neutrino mass in neutrinoless double beta decay (m{sub {beta}}{sub {beta}}); and the sum of neutrino masses in cosmology ({sigma}). In particular, we include the constraints coming from the first Main Injector Neutrino Oscillation Search (MINOS) data and from the Wilkinson Microwave Anisotropy Probe (WMAP) three-year (3y) data, as well as other relevant cosmological data and priors. We find that the largest neutrino squared mass difference is determined with a 15% accuracy (at 2{sigma}) after adding MINOS to world data. We also find upper bounds on the sum of neutrino masses {sigma} ranging from {approx}2 eV (WMAP-3y data only) to {approx}0.2 eV (all cosmological data) at 2{sigma}, in agreement with previous studies. In addition, we discuss the connection of such bounds with those placed on the matter power spectrum normalization parameter {sigma}{sub 8}. We show how the partial degeneracy between {sigma} and {sigma}{sub 8} in WMAP-3y data is broken by adding further cosmological data, and how the overall preference of such data for relativelymore » high values of {sigma}{sub 8} pushes the upper bound of {sigma} in the sub-eV range. Finally, for various combination of data sets, we revisit the (in)compatibility between current {sigma} and m{sub {beta}}{sub {beta}} constraints (and claims), and derive quantitative predictions for future single and double beta decay experiments.« less

Authors:
; ;  [1]; ;  [2];  [1];  [3];  [4];  [5]
  1. Dipartimento di Fisica and Sezione INFN di Bari, Via Amendola 173, 70126, Bari (Italy)
  2. Dipartimento di Fisica and Sezione INFN, Universita degli Studi di Roma 'La Sapienza', P.le Aldo Moro 5, 00185, Rome (Italy)
  3. (United Kingdom)
  4. Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH (United Kingdom)
  5. Faculty of Mathematics and Physics, University of Ljubljana (Slovenia)
Publication Date:
OSTI Identifier:
21020041
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.053001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; ANISOTROPY; COSMIC NEUTRINOS; COSMOLOGY; DATA ANALYSIS; DOUBLE BETA DECAY; ENERGY SPECTRA; MASS DIFFERENCE; MICROWAVE RADIATION; NEUTRINO DETECTION; NEUTRINO OSCILLATION; NEUTRINO REACTIONS; REST MASS

Citation Formats

Fogli, G. L., Lisi, E., Marrone, A., Melchiorri, A., Serra, P., Palazzo, A., Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, Silk, J., and Slosar, A. Observables sensitive to absolute neutrino masses: A reappraisal after WMAP 3-year and first MINOS results. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.053001.
Fogli, G. L., Lisi, E., Marrone, A., Melchiorri, A., Serra, P., Palazzo, A., Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, Silk, J., & Slosar, A. Observables sensitive to absolute neutrino masses: A reappraisal after WMAP 3-year and first MINOS results. United States. doi:10.1103/PHYSREVD.75.053001.
Fogli, G. L., Lisi, E., Marrone, A., Melchiorri, A., Serra, P., Palazzo, A., Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, Silk, J., and Slosar, A. Thu . "Observables sensitive to absolute neutrino masses: A reappraisal after WMAP 3-year and first MINOS results". United States. doi:10.1103/PHYSREVD.75.053001.
@article{osti_21020041,
title = {Observables sensitive to absolute neutrino masses: A reappraisal after WMAP 3-year and first MINOS results},
author = {Fogli, G. L. and Lisi, E. and Marrone, A. and Melchiorri, A. and Serra, P. and Palazzo, A. and Astrophysics, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH and Silk, J. and Slosar, A.},
abstractNote = {In the light of recent neutrino oscillation and nonoscillation data, we revisit the phenomenological constraints applicable to three observables sensitive to absolute neutrino masses: The effective neutrino mass in single beta decay (m{sub {beta}}); the effective Majorana neutrino mass in neutrinoless double beta decay (m{sub {beta}}{sub {beta}}); and the sum of neutrino masses in cosmology ({sigma}). In particular, we include the constraints coming from the first Main Injector Neutrino Oscillation Search (MINOS) data and from the Wilkinson Microwave Anisotropy Probe (WMAP) three-year (3y) data, as well as other relevant cosmological data and priors. We find that the largest neutrino squared mass difference is determined with a 15% accuracy (at 2{sigma}) after adding MINOS to world data. We also find upper bounds on the sum of neutrino masses {sigma} ranging from {approx}2 eV (WMAP-3y data only) to {approx}0.2 eV (all cosmological data) at 2{sigma}, in agreement with previous studies. In addition, we discuss the connection of such bounds with those placed on the matter power spectrum normalization parameter {sigma}{sub 8}. We show how the partial degeneracy between {sigma} and {sigma}{sub 8} in WMAP-3y data is broken by adding further cosmological data, and how the overall preference of such data for relatively high values of {sigma}{sub 8} pushes the upper bound of {sigma} in the sub-eV range. Finally, for various combination of data sets, we revisit the (in)compatibility between current {sigma} and m{sub {beta}}{sub {beta}} constraints (and claims), and derive quantitative predictions for future single and double beta decay experiments.},
doi = {10.1103/PHYSREVD.75.053001},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}
  • In the context of three-flavor neutrino mixing, we present a thorough study of the phenomenological constraints applicable to three observables sensitive to absolute neutrino masses: The effective neutrino mass in Tritium beta-decay (m{sub {beta}}); the effective Majorana neutrino mass in neutrinoless double beta-decay (m{sub {beta}}{sub {beta}}); and the sum of neutrino masses in cosmology ({sigma}). We discuss the correlations among these variables which arise from the combination of all the available neutrino oscillation data, in both normal and inverse neutrino mass hierarchy. We set upper limits on m{sub {beta}} by combining updated results from the Mainz and Troitsk experiments. Wemore » also consider the latest results on m{sub {beta}}{sub {beta}} from the Heidelberg-Moscow experiment, both with and without the lower bound claimed by such experiment. We derive upper limits on {sigma} from an updated combination of data from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite and the two degrees Fields (2dF) Galaxy Redshifts Survey, with and without Lyman-{alpha} forest data from the Sloan Digital Sky Survey (SDSS), in models with a nonzero running of the spectral index of primordial inflationary perturbations. The results are discussed in terms of two-dimensional projections of the globally allowed region in the (m{sub {beta}},m{sub {beta}}{sub {beta}},{sigma}) parameter space, which neatly show the relative impact of each data set. In particular, the (in)compatibility between {sigma} and m{sub {beta}}{sub {beta}} constraints is highlighted for various combinations of data. We also briefly discuss how future neutrino data (both oscillatory and nonoscillatory) can further probe the currently allowed regions.« less
  • In this followup to Phys. Rev. D 75, 053001 (2007) , we report updated constraints on neutrino mass-mixing parameters, in light of recent neutrino oscillation data (KamLAND, SNO, and MINOS) and cosmological observations (WMAP 5-year and other data). We discuss their interplay with the final 0{nu}2{beta} decay results in {sup 76}Ge claimed by part of the Heidelberg-Moscow Collaboration, using recent evaluations of the corresponding nuclear matrix elements, and their uncertainties. We also comment on the 0{nu}2{beta} limits in {sup 130}Te recently set by Cuoricino and on prospective limits or signals from the Karlsruhe tritium neutrino experiment.
  • In this paper, we revisit brane inflation models with the WMAP five-year results. The WMAP five-year data favor a red-tilted power spectrum of primordial fluctuations at the level of two standard deviations, which is the same as the WMAP three-year result qualitatively, but quantitatively the spectral index is slightly greater than the three-year value. This result can bring impacts on brane inflation models. According to the WMAP five-year data, we find that the KKLMMT model can survive at the level of one standard deviation, and the fine-tuning of the parameter {beta} can be alleviated to a certain extent at themore » level of two standard deviations.« less
  • The model of natural inflation is examined in light of recent 3-year data from the Wilkinson Microwave Anisotropy Probe and shown to provide a good fit. The inflaton potential is naturally flat due to shift symmetries, and in the simplest version takes the form V({phi})={lambda}{sup 4}[1{+-}cos(N{phi}/f)]. The model agrees with WMAP3 measurements as long as f>0.7m{sub Pl} (where m{sub Pl}=1.22x10{sup 19} GeV) and {lambda}{approx}m{sub GUT}. The running of the scalar spectral index is shown to be small--an order of magnitude below the sensitivity of WMAP3. The location of the field in the potential when perturbations on observable scales are producedmore » is examined; for f>5m{sub Pl}, the relevant part of the potential is indistinguishable from a quadratic, yet has the advantage that the required flatness is well-motivated. Depending on the value of f, the model falls into the large field (f{>=}1.5m{sub Pl}) or small field (f<1.5m{sub Pl}) classification scheme that has been applied to inflation models. Natural inflation provides a good fit to WMAP3 data.« less
  • Reported here are results, which have been published in [6], from the MINOS experiment from its first year of data-taking with neutrinos from Fermilab's NuMI beam. During this period, 1.27x10{sup 20} protons were delivered to the neutrino target. MINOS consists of two detectors, located 1 km and 735 km from the neutrino beam origin. A deficit of {nu}{sub {mu}} neutrinos are observed in the far detector, with only 215 events observed below 30 GeV, compared to 336{+-}14 events expected in the absence of neutrino oscillations. The data are consistent with neutrino oscillations with |{delta}m{sub 23}{sup 2}| = 2.74{sub -0.26}{sup +0.44}x10{supmore » -3} eV{sup 2} and sin{sup 2}(2{theta}{sub 23})>0.87, at the 68% confidence level.« less