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The recent detection of the solar neutrino background at Dark Matter direct detection experiments paves the way to fully explore an important degeneracy in neutrino oscillations in the presence of new interactions, named the LMA-Dark…

High Energy Physics - Phenomenology · Physics 2025-12-02 Julia Gehrlein , Tanmay Kushwaha

In presence of non-standard neutrino interactions the neutrino flavor evolution equation is affected by a degeneracy which leads to the so-called LMA-Dark solution. It requires a solar mixing angle in the second octant and implies an…

High Energy Physics - Phenomenology · Physics 2017-05-24 Pilar Coloma , Peter B. Denton , M. C. Gonzalez-Garcia , Michele Maltoni , Thomas Schwetz

In the presence of non-standard neutrino interactions (NSI), a degeneracy exists in neutrino oscillation data, which involves the flipping of the octant of the mixing angle ${\theta_{12}}$ and the type of the neutrino mass ordering. In this…

High Energy Physics - Phenomenology · Physics 2021-05-10 Mariano Esteves Chaves , Thomas Schwetz

The determination of the neutrino mass ordering is currently pursued by several experiments and proposals. A very challenging one is its evaluation from reactor experiments based on the tiny interference effect between the $\Delta m^2_{31}$…

High Energy Physics - Phenomenology · Physics 2017-12-20 Luca Stanco , Giuseppe Salamanna , Alexey Lokhov , Fatma Sawy , Chiara Sirignano

In the presence of non-standard neutrino interactions (NSI), oscillation data are affected by a degeneracy which allows the solar mixing angle to be in the second octant (aka the dark side) and implies a sign flip of the atmospheric…

High Energy Physics - Phenomenology · Physics 2017-12-20 Pilar Coloma , M. C. Gonzalez-Garcia , Michele Maltoni , Thomas Schwetz

We review the status of the neutrino oscillation physics (as of June 2003), with a particular emphasis on the present knowledge of the neutrino mass-mixing parameters in a three generation approach. We consider first the nu_mu-->nu_tau…

High Energy Physics - Phenomenology · Physics 2009-11-10 G. L. Fogli , E. Lisi , A. Marrone , D. Montanino , A. Palazzo , A. M. Rotunno

In the context of three-neutrino oscillations, we study the possibility of using antineutrinos from nuclear reactors to explore the 10^{-4} {\rm eV^2} < \ms \ltap 8\times 10^{-4} {\rm eV^2} region of the LMA MSW solution of the solar…

High Energy Physics - Phenomenology · Physics 2009-11-07 S. T. Petcov , M. Piai

We study the implications of the Dark-LMA solution to the solar neutrino problem for neutrino-less double beta decay ($0\nu\beta\beta$ ). We show that while the predictions for the effective mass governing $0\nu\beta\beta$ remains unchanged…

High Energy Physics - Phenomenology · Physics 2019-12-17 Vishnudath K. N. , Sandhya Choubey , Srubabati Goswami

We investigate constraints on neutrino mass ordering and degeneracy by considering the first cosmological result based on Planck measurements of the cosmic microwave background. It is shown that the result at 95% CL rejects a neutrino mass…

High Energy Physics - Phenomenology · Physics 2015-06-15 Naoyuki Haba , Ryo Takahashi

Within the standard 3nu mass-mixing framework, we present an up-to-date global analysis of neutrino oscillation data (as of January 2016), including the latest available results from experiments with atmospheric neutrinos (Super-Kamiokande…

High Energy Physics - Phenomenology · Physics 2016-06-22 F. Capozzi , E. Lisi , A. Marrone , D. Montanino , A. Palazzo

In presence of non standard interactions, the solar neutrino data is consistent with two solutions, one close to the standard LMA solution with $\sin^2\theta_{12} \simeq 0.3$ and another with $\sin^2\theta_{12}^D \simeq…

High Energy Physics - Phenomenology · Physics 2021-02-03 Sandhya Choubey , Dipyaman Pramanik

The reported signal at the LSND experiment, when interpreted as neutrino mixing with $\delta m^2 = 6 \;\rm{eV}^2$, provides evidence for neutrinos with a cosmologically significant mass. However, attempts to reconcile this interpretation of…

Astrophysics · Physics 2009-10-28 Christian Y. Cardall , George M. Fuller

We investigate how the data from various future neutrino oscillation experiments will constrain the physics parameters for a three active neutrino mixing model. The investigations properly account for the degeneracies and ambiguities…

High Energy Physics - Experiment · Physics 2009-09-09 Kendall B. M. Mahn , Michael H. Shaevitz

We consider the impact of neutral-current (NC) non-standard neutrino interactions (NSI) on the determination of the neutrino mass ordering. We show that in presence of NSI there is an exact degeneracy which makes it impossible to determine…

High Energy Physics - Phenomenology · Physics 2017-04-19 Pilar Coloma , Thomas Schwetz

We present a comprehensive analysis of the interactions of neutrinos with the dark sector within the simplified model framework. We first derive the exact analytic formulas for the differential scattering cross sections of neutrinos with…

High Energy Physics - Phenomenology · Physics 2025-07-02 P. S. Bhupal Dev , Doojin Kim , Deepak Sathyan , Kuver Sinha , Yongchao Zhang

We derive constraints on parameters of the radiatively decaying Dark Matter (DM) particles, using XMM-Newton EPIC spectra of the Andromeda galaxy (M31). Using the observations of the outer (5'-13') parts of M31 we improve the existing…

Astrophysics · Physics 2008-11-07 Alexey Boyarsky , Dmytro Iakubovskyi , Oleg Ruchayskiy , Vladimir Savchenko

Electroweak radiative corrections can generate the neutrino (mass)$^2$ difference required for the large mixing angle solution (LMA) to the solar neutrino problem if two of the neutrinos are assumed degenerate at high energy. We test this…

High Energy Physics - Phenomenology · Physics 2009-11-10 Anjan S. Joshipura , Subhendra Mohanty

Double beta decay is indispensable to solve the question of the neutrino mass matrix together with $\nu$ oscillation experiments. The most sensitive experiment - since eight years the HEIDELBERG-MOSCOW experiment in Gran-Sasso - already…

High Energy Physics - Phenomenology · Physics 2016-09-06 H. V. Klapdor-Kleingrothaus

In the presence of neutrino Non-Standard Interactions (NSI) with matter, the derivation of neutrino parameters from oscillation data must be reconsidered. In particular, along with the standard solution to neutrino oscillation, another…

High Energy Physics - Phenomenology · Physics 2018-04-12 Peter B. Denton , Yasaman Farzan , Ian M. Shoemaker

Supernova cooling has long been used to constrain physics beyond the Standard Model, typically involving new mediators or dark matter (DM) particles that couple to nucleons or electrons. In this work, we show that the large density of…

High Energy Physics - Phenomenology · Physics 2025-03-14 Christopher V. Cappiello , P. S. Bhupal Dev , Amol V. Patwardhan
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