Sterile Neutrinos in astrophysical and cosmological sauce
arXiv:astro-ph/0410122
Abstract
The study of sterile neutrinos has recently acquired a different flavor: being now excluded as the dominant solution for the solar or atmospheric conversions, sterile neutrinos, still attractive for many other reasons, have thus become even more elusive. The present relevant questions are: which subdominant role can they have? Where (and how) can they show up? Cosmology and supernovae turn out to be powerful tools to address these issues. With the most general mixing scenarios in mind, I present the analysis of many possible effects on BBN, CMB, LSS, and in SN physics due to sterile neutrinos. I discuss the computational techniques, present the state-of-the-art bounds, identify the still allowed regions and study some of the most promising future probes. I show how the region of the LSND sterile neutrino is excluded by the constraints of standard cosmology.
arXiv commentBased on the published Proceedings for the 10th International Symposium on Particles, Strings and Cosmology (PASCOS '04), August 2004, Boston, USA and for the XVI Incontri sulla Fisica delle Alte Energie (IFAE), April 2004, Torino, Italy; with slightly expanded discussion and references. v2: some references corrected
References in corpus (38)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
- Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
- Tau Neutrinos Favored over Sterile Neutrinos in Atmospheric Muon Neutrino Oscillations
- Neutrino Masses from Large Extra Dimensions
- Light Neutrinos without Heavy Mass Scales: A Higher-Dimensional Seesaw Mechanism
- Cosmic Complementarity: Joint Parameter Estimation from CMB Experiments and Redshift Surveys
- Systematic effects and a new determination of the primordial abundance of 4He and dY/dZ from observations of blue compact galaxies
- A precision calculation of the effective number of cosmological neutrinos
- Probing Large Extra Dimensions with Neutrinos
- A Realistic Determination of the Error on the Primordial Helium Abundance: Steps Toward Non-Parametric Nebular Helium Abundances
- The Primordial Abundance of He4: An Update
- Helium abundance in the most metal-deficient blue compact galaxies: I Zw 18 and SBS 0335-052
- Matter Effects in Upward-Going Muons and Sterile Neutrino Oscillations
- The Chemical Composition of the Small Magellanic Cloud H II Region NGC 346 and the Primordial Helium Abundance
- Low reheating temperature and the visible sterile neutrino
- On the Abundance of Primordial Helium
- Probing oscillations into sterile neutrinos with cosmology, astrophysics and experiments
- Neutrinoless Universe
- An Active-Sterile Neutrino Transformation Solution for r-Process Nucleosynthesis
- Probing neutrino masses with future galaxy redshift surveys
- Interpreting the LSND anomaly: sterile neutrinos or CPT-violation or...?
- Temperature Bias and the Primordial Helium Abundance Determination
- Homestake result, sterile neutrinos and low energy solar neutrino experiments
- Constraints on neutrino oscillation parameters from the SNO salt phase data
- Constraining the helium abundance with CMB
- WMAPping out Neutrino Masses
- Chiral Gauge Models for Light Sterile Neutrinos
- Avoiding BBN Constraints on Mirror Models for Sterile Neutrinos
- Signatures of Supernova Neutrino Oscillations into Extra Dimensions
- Bulk neutrinos and core collapse supernovae
- Cosmic Microwave Background Anisotropies: Beyond Standard Parameters
- Can four neutrinos explain global oscillation data including LSND and cosmology?
- Diffuse Ionization in the Milky Way and Sterile Neutrinos
- Status of neutrino oscillations II: How to reconcile the LSND result?
- Blue compact galaxies and the primordial 4Helium abundance
- Explanations of pulsar velocities