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It is shown that the 99% confidence limits from the analyses of the data of cosmological and neutrino experiments imply a small marginally allowed region in the space of the neutrino oscillation parameters of 3+1 four-neutrino mixing…

High Energy Physics - Phenomenology · Physics 2009-11-10 C. Giunti

We suggest the possibility that the anomalies observed in the LSND experiment and the Gallium radioactive source experiments may be due to neutrino oscillations generated by a large squared-mass difference of about 20 - 30 eV^2. We consider…

High Energy Physics - Phenomenology · Physics 2008-11-26 Carlo Giunti , Marco Laveder

We consider the possibility that sterile neutrinos exist and admit a description as unparticles; we call these {\em unsterile} neutrinos. We then examine the nature of neutrino oscillations in a model where an unsterile can mix with two…

High Energy Physics - Phenomenology · Physics 2010-04-15 D. Boyanovsky , R. Holman , Jimmy A. Hutasoit

We present the results of a new analysis of the data of the MiniBooNE experiment taking into account the additional background of photons from $\Delta^{+/0}$ decay proposed in arXiv:1909.08571 and additional contributions due to coherent…

High Energy Physics - Phenomenology · Physics 2020-12-30 C. Giunti , A. Ioannisian , G. Ranucci

It is shown that if small neutrino masses owe their origin to the conventional seesaw mechanism and the MNS mixing matrix is in the exact bimaximal form, then there exist symmetries in the theory that allow one of the righthanded neutrinos…

High Energy Physics - Phenomenology · Physics 2009-11-07 R. N. Mohapatra

Although the hypothetic sterile neutrino $\nu_s$ is probably not involved significantly in the deficits of solar $\nu_e$'s and atmospheric $\nu_\mu$'s, it may cause the possible LSND effect. In fact, we face such a situation, when the…

High Energy Physics - Phenomenology · Physics 2007-05-23 W Krolikowski

We examine the MiniBooNE neutrino, MiniBooNE antineutrino and LSND antineutrino data sets in a two-neutrino $\stackrel{\tiny{(-)}}{\nu}_{\mu}\rightarrow\stackrel{\tiny{(-)}}{\nu}_e$ oscillation approximation subject to non-standard matter…

High Energy Physics - Phenomenology · Physics 2012-02-07 G. Karagiorgi , M. H. Shaevitz , J. M. Conrad

We formulate a set of naturalness criteria for sterile neutrinos (\nu') to be light, needed for reconciling the LSND neutrino anomaly with the other neutrino data. A light sterile neutrino becomes as natural as the light active neutrinos if…

High Energy Physics - Phenomenology · Physics 2009-11-10 K. S. Babu , Gerhart Seidl

The LSND signal for \bar\nu_\mu to \bar\nu_e oscillations has prompted supposition that there may be a fourth light neutrino or that CPT is violated. Neither explanation provides a good fit to all existing neutrino data. We examine the even…

High Energy Physics - Phenomenology · Physics 2009-09-15 V. Barger , D. Marfatia , K. Whisnant

The physics motivations, design, and status of the Booster Neutrino Experiment at Fermilab, MiniBooNE, are briefly discussed. Particular emphasis is given on the ongoing preparatory work that is needed for the MiniBooNE muon neutrino to…

High Energy Physics - Experiment · Physics 2009-11-11 Michel Sorel

Adopting the 3+1 neutrino mixing parameters by the IceCube and shortbase line experiments, we investigate the sterile-active neutrino oscillation effects on the supernova neutrino process. For the sterile neutrino ($\nu_s$), we study two…

High Energy Physics - Phenomenology · Physics 2021-02-19 Heamin Ko , Dukjae Jang , Motohiko Kusakabe , Myung-Ki Cheoun

This paper examines sterile neutrino oscillation models in light of recently published results from the MiniBooNE Experiment. The new MiniBooNE data include the updated neutrino results, including the low energy region, and the first…

High Energy Physics - Phenomenology · Physics 2014-11-20 G. Karagiorgi , Z. Djurcic , J. M. Conrad , M. H. Shaevitz , M. Sorel

A class of calculable global models for neutrino oscillations based on Lorentz and CPT violation is presented. One simple example matches established neutrino data from accelerator, atmospheric, reactor, and solar experiments, using only…

High Energy Physics - Phenomenology · Physics 2015-05-30 Jorge S. Diaz , Alan Kostelecky

The three-flavor framework of neutrino oscillations successfully explains most experimental results, but persistent anomalies at short- and long-baseline experiments hint at the existence of additional light sterile states. In particular,…

High Energy Physics - Phenomenology · Physics 2026-03-19 Srubabati Goswami , Hemanth M. , Debashis Pachhar , N Rajeev

We explore the hypothesis that the unexplained data from LSND and MiniBooNE are evidence for a new, heavy neutrino mass-eigenstate that mixes with the muon-type neutrino and decays into an electron-type neutrino and a new, very light scalar…

High Energy Physics - Phenomenology · Physics 2020-10-13 André de Gouvêa , O. L. G. Peres , Suprabh Prakash , G. V. Stenico

We study the constraints imposed by neutrino oscillation experiments on the minimal extension of the Standard Model that can explain neutrino masses, which requires the addition of just two singlet Weyl fermions. The most general…

High Energy Physics - Phenomenology · Physics 2012-09-18 A. Donini , P. Hernandez , J. Lopez-Pavon , M. Maltoni , T. Schwetz

We examine the compatibility between existing experimental data and a recently proposed explanation of the LSND and MiniBooNE anomalies, given in terms of a sterile neutrino $N$ whose decay is dominated by a radiative mode. We find that…

High Energy Physics - Phenomenology · Physics 2013-05-29 Claudio Dib , Juan Carlos Helo , Sergey Kovalenko , Ivan Schmidt

The MiniBooNE Experiment has contributed substantially to beyond standard model searches in the neutrino sector. The experiment was originally designed to test the $\Delta m^2$~1 eV$^2$ region of the sterile neutrino hypothesis by observing…

High Energy Physics - Experiment · Physics 2014-05-01 Teppei Katori , Janet Conrad

The possibility of the validation of the 3+1 neutrino model is considered in the context of the new result of the Neutrino-4 experiment, the direct observation of the oscillation effect at parameter region $\Delta m_{14}^2=(7.3 \pm…

High Energy Physics - Phenomenology · Physics 2021-10-22 A. Serebrov , R. Samoilov , M. Chaikovskii

Neutrino oscillations have been established in solar and atmospheric neutrinos, but a third signal from the LSND experiment is incompatible with three Standard Model neutrinos. The MiniBooNE experiment can confirm or refute the LSND signal…

High Energy Physics - Experiment · Physics 2015-06-25 J. Monroe