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We propose a four-neutrino model which can reconcile the existing data coming from underground experiments in terms of neutrino oscillations, together with the hint from the LSND experiment and a possible neutrino contribution to the hot…

High Energy Physics - Phenomenology · Physics 2009-09-17 A. Ioannisian , J. W. F. Valle

A phenomenological model with active and sterile neutrinos is used for calculations of neutrino oscillation characteristics at the normal mass hierarchy of active neutrinos. Taking into account the contributions of sterile neutrinos,…

High Energy Physics - Phenomenology · Physics 2019-12-11 V. V. Khruschov , S. V. Fomichev

The investigation of the oscillation pattern induced by the sterile neutrinos might determine the oscillation parameters, and at the same time, allow to probe CPT symmetry in the leptonic sector through neutrino-antineutrino mass…

High Energy Physics - Experiment · Physics 2015-09-23 M. V. Smirnov , K. K. Loo , Yu. N. Novikov , W. H. Trzaska , M. Wurm

We propose a new explanation of the intriguing LSND evidence for electron antineutrino appearance in terms of heavy (mostly sterile) neutrino decay via a coupling with a light scalar and light (mostly active) neutrinos. We perform a fit to…

High Energy Physics - Phenomenology · Physics 2009-11-11 Sergio Palomares-Ruiz

The experimental observation of neutrino oscillations profoundly impacted the physics of neutrinos, from being well understood theoretically to requiring new physics beyond the standard model of particle physics. Indeed, the mystery of…

High Energy Physics - Experiment · Physics 2022-09-28 Nicolò Foppiani

We present new results of measurements of reactor antineutrino flux and spectrum dependence on the distance in the range 6-12 meters from the center of the reactor core at SM-3 reactor (Dimitrovgrad, Russia). Additional measurements were…

High Energy Physics - Experiment · Physics 2020-12-02 A. P. Serebrov , R. M. Samoilov

Light sterile neutrinos might mix with the active ones and be copiously produced in the early Universe. In the present paper, a detailed multi-flavor analysis of sterile neutrino production is performed. Making some justified approximations…

High Energy Physics - Phenomenology · Physics 2009-01-27 Alessandro Melchiorri , Olga Mena , Sergio Palomares-Ruiz , Silvia Pascoli , Anze Slosar , Michel Sorel

Some evidence for sterile neutrinos has been found in short baseline observations where the measured neutrino flux did not agree with expectations. Systematic uncertainties from the expected values has limited the sensitivity of this…

High Energy Physics - Experiment · Physics 2015-08-26 John LoSecco

There has been designed an experimental project "Neutrino-4" for 100 MW reactor SM-3 to test the hypothesis of the "reactor antineutrino anomaly". Advantages of the reactor SM-3 for such an experiment are low background conditions as well…

The reactor antineutrino energy spectra and flux were reevaluated during the preparation of the recent experiments devoted to the measurement of $\theta_{13}$. Consequently some discrepancies between data and the theoretical predictions in…

Instrumentation and Detectors · Physics 2017-10-24 Luis Manzanillas

A number of anomalous results in short-baseline oscillation may hint at the existence of one or more light sterile neutrino states in the eV mass range and have triggered a wave of new experimental efforts to search for a definite signature…

High Energy Physics - Experiment · Physics 2019-11-06 Sebastian Böser , Christian Buck , Carlo Giunti , Julien Lesgourgues , Livia Ludhova , Susanne Mertens , Anne Schukraft , Michael Wurm

We propose an explanation of the LSND evidence for electron antineutrino appearance based on neutrino decay. We introduce a heavy neutrino, which is produced in pion and muon decays because of a small mixing with muon neutrinos, and then…

High Energy Physics - Phenomenology · Physics 2009-11-11 Sergio Palomares-Ruiz , Silvia Pascoli , Thomas Schwetz

Short distance reactor antineutrino experiments measure an antineutrino spectrum a few percent lower than expected from theoretical predictions. In this work we study the potential of low energy threshold reactor experiments in the context…

High Energy Physics - Phenomenology · Physics 2019-08-20 B. C. Cañas , E. A. Garcés , O. G. Miranda , A. Parada

We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, and for the reactor anomaly. The first scenario is the mini-seesaw mechanism with two eV-scale sterile…

High Energy Physics - Phenomenology · Physics 2015-06-04 JiJi Fan , Paul Langacker

We discuss prospects for probing short-range sterile neutrino oscillation using neutrino-nucleus coherent scattering with ultra-low energy ($\sim 10$ eV - 100 eV) recoil threshold cryogenic Ge detectors. The analysis is performed in the…

High Energy Physics - Phenomenology · Physics 2016-11-23 Bhaskar Dutta , Yu Gao , Andrew Kubik , Rupak Mahapatra , Nader Mirabolfathi , Louis E. Strigari , Joel W. Walker

We review the status of light sterile neutrino searches, motivated by the original Short BaseLine (SBL) anomalies. Here, we discuss how sterile neutrino properties can be constrained by different types of neutrino oscillation experiments…

High Energy Physics - Phenomenology · Physics 2022-03-02 Stefano Gariazzo

In the last decades, the results from a number of short-baseline neutrino experiments and the reanalysis of previous reactor experiments with updated antineutrino fluxes suggest some incompatibility with the standard three-neutrino model. A…

High Energy Physics - Experiment · Physics 2015-05-01 Debra Dewhurst

Neutrino physics is currently suffering from lack of knowledge from at least four major ingredients. One of them is the presence or not of new sterile neutrino states at the mass scale of around 1 eV. Settling this point should be the…

High Energy Physics - Phenomenology · Physics 2016-04-25 Luca Stanco

Lithium 8 is a short lived beta emitter producing a high energy anti-neutrino, which is very suitable for making several measurements of fundamental quantities. It is proposed to produce Lithium 8 with a commercially available 60 MeV…

Accelerator Physics · Physics 2015-03-20 Adriana Bungau , Roger Barlow , Michael Shaevitz , Janet Conrad , Joshua Spitz