Concept

Oscillation des neutrinos

Publications associées (418)

Constraints on decaying dark matter from XMM-Newton observations of M31

We derive constraints on the parameters of the radiatively decaying dark matter (DM) particle, using the XMM-Newton EPIC spectra of the Andromeda galaxy (M31). Using the observations of the outer (5-13 arcmin) parts of M31, we improve the existing constrai ...

Blackwell Publishing Ltd, Oxford2008

Leptogenesis with an almost conserved lepton number

Steve Blanchet

Seesaw models with a slightly broken lepton number symmetry can explain small neutrino masses, and allow for low-scale leptogenesis. We make a thorough analysis of leptogenesis within the simplest model with two right-handed (RH) neutrinos (or with N_3 dec ...

2008

Unstable Operation of Francis Pump-Turbine at Runaway: Rigid and Elastic Water Column Oscillation Modes

François Avellan, Jean-Jacques Simond, Christophe Nicolet, Basile Kawkabani, Sébastien Alligné

This paper presents a numerical simulation study of the transient behavior of a 2x340MW pump-turbine power plant, where the results show an unstable behavior at runaway. First, the modeling of hydraulic components based on equivalent schemes is presented. ...

International Association For Hydraulic Research2008

Search for lepton-flavor-violating τ → ℓ V0 decays at Belle

Olivier Schneider, Chao Wang, Tagir Aushev, Vladislav Balagura, Xiao Wang

We have searched for neutrinoless τ lepton decays into ℓ and V0, where ℓ stands for an electron or muon, and V0 for a vector meson (φ{symbol}, ω, K* 0, over(K, ̄)* 0 or ρ0), using 543 fb-1 of data collected with the Belle detector at the KEKB asymmetric-en ...

2008

Gamma Oscillations in a Nonlinear Regime: A Minimal Model Approach Using Heterogeneous Integrate-and-Fire Networks

Brice Bathellier

Fast oscillations and in particular gamma-band oscillation (20-80 Hz) are commonly observed during brain function and are at the center of several neural processing theories. In many cases, mathematical analysis of fast oscillations in neural networks has ...

Massachusetts Institute of Technology Press2008

Interpretation of in-phase and out-of-phase BWR oscillations using an extended reduced order model and semi-analytical bifurcation analysis

Rakesh Chawla, Abdelhamid Dokhane

An extended reduced order model is presented and applied to analyze global and regional oscillations in BWRs. Stability and semianalytical bifurcation analyses are performed using this model in conjunction with the bifurcation code BIFDD to determine the s ...

Elsevier2007

A possible symmetry of the nuMSM

To explain the dark matter and the baryon asymmetry of the Universe, the parameters of the ν MSM (an extension of the Minimal Standard Model by three singlet neutrinos with masses smaller than the electroweak scale) must be fine-tuned: one of the masses sh ...

2007

How to find neutral leptons of the nuMSM?

An extension of the Standard Model by three singlet fermions with masses smaller than the electroweak scale allows to explain simultaneously neutrino oscillations, dark matter and baryon asymmetry of the Universe. We discuss the properties of neutral lepto ...

2007

Search for lepton flavor violating τ- decays into ℓ- η, ℓ- η′ and ℓ- π0

Olivier Schneider, Aurelio Bay, Chao Wang

We have searched for lepton-flavor-violating τ decays with a pseudoscalar meson (η, η′ and π0) using a data sample of 401 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is found and we set ...

2007

B°s --> J/[psi][eta]' decay and sensitivity to the Bs mixing phase at LHCb

Sergio Jiménez-Otero

The LHCb experiment is one of four main experiments to be setup at IP8 point of the proton-proton Large Hadron Collider (LHC) at CERN, Geneva. The data taking is scheduled to start end 2007. The LHCb detector is a forward single-arm spectrometer conceived ...

EPFL2007

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